Dialin
二氢化萘
🗣️ 情景例句
We haven't heard from him for weeks but we're still hoping for a letter.
我们已经有几个星期没有他的消息，但仍然盼望着他的来信。
He told me to take these pills every four hours.
他告诉了我每4小时吃一次这些药片。
That's good to know.
幸好知道了这件事。