Whewellite
水草酸钙石
🗣️ 情景例句
Now the hard work begins.
艰苦的工作现在开始了。
He threw a dance for them.
他为他们举行晚会。
why have we had no visitors from outer space yet?
那么我们为什么还未见到外层空间来访的客人呢？