It is evident that smoking is harmful to health.

显而易见，吸烟有害健康。

Smoking is not only harmful to smokers themselves, but also threatens other people's health.

吸烟不仅对吸烟者有害，也会威胁其他人的健康。

Smoking is not only harmful to smokers themselves but also a threat to public health, especially to women and children.

吸烟不仅对吸烟者本身有害，而且对公共健康，尤其对妇女和儿童的健康造成威胁。

Fruit juices can be harmful to children's teeth.

果汁可能损坏儿童的牙齿。

They did something harmful to their opponent.

他们做了一些伤害对手的事。