3. harm v. n. 伤害
v. harm sth. / sb. 伤害某物/某人 吸烟有害健康。 Smoking harms your health. n. do harm to sb./ sth. 对某人/某物有害 do sb. / sth. harm 对某人/物有害 吸烟有害健康。 Smoking does harm to our health. 补充:___________ adj. 无害的 ___________ adj. 有害的 __________________对某物有害
harmless
harmful
be harmful to sth.