Self-activity
n. 自动；自发活动
🧩 词语组成解析
self
[self]
n. 自己;本人;本性;私利;
adj. 同一的;纯净的;单一的;
vt. 使自花授精;使近亲繁殖;
vi. 自花授精;
🗣️ 情景例句
Well, I've thought a lot about which college,
嗯， 我为了上哪一所大学想了很多，
I asked him to lend me a book , but he wouldn't.
我请他把书借给我，但是他不肯。
for there was a danger that if she traveled too quickly, this rudder would be torn away as well.
因为船不能开得太快，否则就有危险，应急舵也会被刮走。