First investment
[医] 内层包埋料, 内层围模料
🧩 词语组成解析
first
[fɝst]
n. 第一，最初;头等;一号，;[乐]高音部;
adv. 最早，最初;首次;宁愿;优先;
adj. 第一流的;最初的，最早的;基本的，概要的;高音的;
num. 第一;
🗣️ 情景例句
and wrote to his wife Martha.
给他妻子Martha写信。
Really? I was introduced to her just last weekend.
真的？上周末我才被介绍给她。
While this was going on, Mr.Taylor was upstairs.
这开始发生时，泰勒先生正在楼上。