吃透英语课本，提升在校竞争力
phrase. 不参与；退出
He'd dropped out of high school at the age of 16.
他16岁时就从高中退学了。
If your cards don't promise a winning outcome, you can drop out of the game without great loss.
如果你的牌不能保证可以获得胜利的输出，你可以退出游戏而不会损失太多。
You'd be crazy to drop out.
你要退学真是发疯了。
Morse was yet another name that appeared before walrus and seems to have spread to other languages only to drop out of use in English.
莫尔斯是另一个在海象流传以前就存在的名称，并且似乎已经传播到其他语言而唯独在英语中退出了。
school dropout
辍学
