Preliminary amplifier
[计] 前置放大器
🧩 词语组成解析
preliminary
[prɪ'lɪmɪnɛri]
adj. 初步的，初级的;预备的;开端的;序言的;
n. 准备工作;预赛;初步措施;（对学生等的）预考;
pre预先+limin门槛，限制+ary形容词后缀→入门以前→初步的
🗣️ 情景例句
when Susan and Richard were babies?
当Richard和Susan还很小时？
I played ping-pong this morning.
我今早在打乒乓球。
Would you like to come to supper?
你愿意来吃晚饭吗？