Billietite
黄钡铀矿
🗣️ 情景例句
How are you doing?
你好吗？
What has the captain ordered us to do?
船长命令我们做那些事？
They had a definite meaning, for they were as near as early man could get to writing.
它们有着一定的含义，因为它们已接近古代人的文字形式。