Fast chemical reaction
[机] 快速化学反应
🧩 词语组成解析
fast
[fæst]
adj. 快的;走得快;感光快的;紧的;
adv. （比准确的时间或宣布的时间）快;迅速地;紧紧地;彻底地;
vi. 禁食，（尤指）斋戒;
n. 禁食期，斋戒期;断食，节食;
🗣️ 情景例句
He started out as a salesman.
他开始时当推销员。
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
Certainly! I'm coming now, Dad!
当然可以，爸爸，我马上就来。