Semialdehyde
半醛
🗣️ 情景例句
When's the last time you took a vacation?
上次你去度假是什么时候？
They've promised to keep both we quality and the quantity of the 300 bicycles in conformity with the contract stipulations.
他们已承诺那300辆自行车的质量和数量一定与合同规定相吻合。
Whose? Jim's?
谁的？吉姆的？