S.d.a.
[医] 特殊动力作用, 右骶前(胎位)
🗣️ 情景例句
I have the strangest feeling we've met before.
我有种奇怪的感觉我们以前见过面。
In universities,students train to become teachers and engineers.
在大学里，学生们被训练成为教师和工程师。
A week before, he had completed a successful overland flight during which he covered twenty-six miles.
一周以前，他曾成功地进行了一次26英里的陆上飞行。