Preamplification
前置放大
🗣️ 情景例句
Please have these clothes washed before eight o'clock tonight.
我今晚8点前请把这些衣服给洗了。
Please try to be congenial and welcome the guests with a small.
请用笑脸愉快地迎接客人吧。
The situation is serious. Something must be done before it's too late.
形势危急。得及时采取措施。