be harmful for还是to

be harmful后面可以接for和to都可以。二者的区别：

1、意思不同

be harmful for表示有害的，为害的，对...有害的。

be harmful to表示导致损害的，致伤的，做...是有害的。

2、用法不同

be harmful for引导的是并列从句，表示原因的语气很弱，一般是对结果作出推断性的补充说明或解释，不表示直接原因。

be harmful to常与位移动词连用，含有寻衅的意味，往往是恶意的。

3、后面接的成分不同

be harmful for：be harmful for后面接名词，多是人或物。

be harmful to：be harmful to后面接动词。

4、具体用法不同

be harmful for+doing.或事物

be harmful to+sb.（在某些情况可以通用）

5、两者在句子中表意不同。

be harmful for.在句子中多跟动词的ing形式

be harmful to.后通常为某人某物。

harmful crack.有害裂缝

potentially harmful.潜在的有害；潜在有害；有害

extremely harmful.极其有害的；十分有害

1、Tears help to protect the eye from potentially harmful foreign bodies.

眼泪有助于保护眼睛去除可能有害的异物。

2、Water is not an effective shield against the sun's more harmful rays.

水不能有效阻挡太阳中更有害的射线。

3、Many household products are potentially harmful.

很多家用产品有潜在的害处。

4、Fruit juices can be harmful to children's teeth.

果汁可能损坏儿童的牙齿。

5、The drug is not harmful per se,but is dangerous when taken with alcohol.

这种药本身无害，但与酒同服就危险了。

6、The drug is to be reclassified after trials showed it to be more harmful than previously thought.

试验显示这种药比先前想象的危害更大，要重新归类。

7、Such laws could protect the consumer from harmful or dangerous remedies

这样的法规可以保护消费者免受有害或者危险药品的威胁。

8、Mr Campbell said such programmes were by their very nature harmful

坎贝尔先生说此类节目本质上就是有害的。

9、Radon is known to be harmful to humans in large quantities

众所周知，大量的氡会对人体造成伤害。

10、Continuous exposure to sound above 80 decibels could be harmful.

持续暴露在强度高于80分贝的噪声中可能有害。

11、Whatever is hidden is harmful(hence revelation equals security)

任何隐藏的东西都是有害的（所以披露就等于安全）。

12、Polyunsaturated oils are essential for health.Excess is harmful,however.

多不饱和油对健康很重要。但是，食用过量就会有害。

13、It's believed the affair was potentially harmful to British aviation.

据信该事件可能对英国航空业造成不利影响。

14、Ozone is best known for its role in screening the Earth from harmful ultraviolet rays from the Sun

臭氧最广为人知的作用是保护地球免受太阳紫外线的伤害。

15、Accidental inhalation of the powder can be harmful

意外的粉尘吸入可能有害。

16、Effluent from the sedimentation tank is dosed with disinfectant to kill any harmful organisms

沉降池中的废水中加入了消毒剂，以消灭所有有害微生物。

17、Cigarette smoke is also harmful to people's health.

香烟的烟雾对人们的健康同样有害。

18、Any conduct harmful to the public interest must not be permitted.

凡是损害公共利益的行为，都应该制止。

19、Excessive smoking is harmful to one's health.

吸烟过多对身体有害处。

20、Excessive drinking is harmful to the health.

饮酒过多会伤害身体。

1、Weight training can be harmful for a child's natural physical development.

力量训练可能对儿童的正常生长发育有害。

2、However,the Internet also carries an amount of unsuited contents,which may be harmful for minor or other persons.

对互联网不适宜内容的管制成为各国政府和公众关注的重要问题。

3、Women in the UK and US are selling their breast milk online,despite serious concerns that it could be harmful for babies.

一些来自英国和美国的女性在网上出售母乳引发争议，有专家提醒称这很可能对宝宝造成伤害。

4、Echinacea also can be harmful for those who have multiple sclerosis,diabetes,HIV infections or allergies.

对患有多发性硬化症、糖尿病、HIV感染或变态反应的患者紫锥花属的毒副作用更大。

5、Caffeine,saturated fats,processed sugars,and salt are known to be harmful for tinnitus patients.

被称为是对耳鸣患者有害的咖啡因，饱和脂肪，加工的糖，和盐。

6、The eddy current losses in flameproof motor cause overheating that may be harmful for the insulation,which directly determine the operation life of the motor.

隔爆电机涡流损耗产生的热量会对电机的绝缘产生不利影响，缩短电机使用寿命。

7、University of Melbourne researchers said that society's downright shunning of being sad could be harmful for sufferers of the blues.

据墨尔本大学的研究人员表示，社会对悲伤的彻底回避，可能会对忧郁患者造成伤害。

8、We work diligently towards achieving reduction in the use of substances that could be harmful for the environment and the health of our employees,partners and customers.

我们努力工作，实现在我们的员工，合作伙伴和客户对环境和健康，减少有害的物质。

9、But for a certain temperature difference,increase of the temperature of whatever tube-side or shell-side could be harmful for the tightness of the joint.

但是在一定的管程壳程温差下，不论增加管程还是壳程的温度，接头的密封性能都可能变差。

10、Voice 2:But racist chanting can be harmful for players,supporters,and other people listening to or watching a sports game.

声音2：但是高喊种族主义言论可能对球员、支持者和其他收听或收看体育比赛的人造成伤害。

1、Fruit juices can be harmful to children's teeth.

果汁可能损坏儿童的牙齿。

2、Radon is known to be harmful to humans in large quantities

众所周知，大量的氡会对人体造成伤害。

3、That can be harmful to the development of creativity.

这对创造力的发展有害。

4、However,unprotected sleep can be harmful to one’s health as it may disturb your biological clock,resulting in your short memory and blunt2 responsiveness.

但睡回笼觉也有可能伤害到你的身体，因为它会扰乱你的生物钟，造成记忆力差、反应迟钝。

5、He said the legislation would be harmful to the family.

他称，这项立法会损害家庭利益。

6、Internet content or content provided by third parties may be harmful to your system.

互联网上的内容或第三方提供的内容可能对您的系统有害。

7、This can be harmful to the respiratory system.

这可能损害呼吸系统。

8、Television can also be harmful to us.

电视对我们也会有害。

9、This may be harmful to the shaping of children's characters.

这可能会有害于塑造孩子的性格。

10、In addition,excessive iodine may also be harmful to thyroid.

而碘过量同样可以影响甲状腺疾病的发生。