Methylnaphthohydroquinone
[化] 甲萘氢醌; 甲基萘氢醌; 维生素K-4
🗣️ 情景例句
I have the key, but it doesn't work.
我有钥匙， 但是开不开箱子。
What will you do during this weekend?
这周末你干什么？
I heard some one laughing.
我听见有人在笑。