🧩 词语组成解析
preventive
[pri'ventiv, pri:-]
n. 预防;防止;预防措施;预防药;
adj. 预防的;防止的;
attack
[ə'tæk]
vt.& vi. 攻击，进攻，抨击;
n. 攻击;抨击;（队员等的）进攻;（疾病）侵袭;
vt. 抨击;非难;侵袭;损害;
🗣️ 情景例句
I have to postpone our appointment.
我要把我们的约会延期。
What time are you leaving?
你几点钟走？
You can enlarge your knowledge and learn some English at the same time.
你可以扩大你的知识面，同时又学习了英语。