Pre-test
[经] 先期测验
🧩 词语组成解析
abbr. 炼油工程师（Petroleum Refining Engineer）
🗣️ 情景例句
But first in the school-rooms.
但首先是在教室 。
After a while,we found a shady place under some poplar trees.
在一会儿以后，我们在一些白杨树下面发现了一块遮阴的地方。
An even harder situation is to be on the platform in good time for a train and still to see it go off without you.
更难堪的情况是虽然及时赶到站台上，却眼睁睁地看着那趟火车启动，把你抛下。