Retinaldehyde
视黄醛
🗣️ 情景例句
That leaves a lot to be desired.
太不让人满意了。
As a sign of friendship, Gordon and Peter clasped hands.
为了象征友谊，高顿和彼德互相握手。
It looks as if she's gone away for a few days.
好象她要外出好几天了。