O-
[医] 正, 邻(化学)
🗣️ 情景例句
He ventured to speak to her.
他鼓起勇气向她说话。
Do you have any brothers?
你有兄弟吗？
A run-down watch is still a watch and can be rewound.
手表停了依然是只手表，还可以重上好发条。