Salufer
氟硅酸钠
🗣️ 情景例句
How about a date with your grandfather?
和你爷爷约个会好吗？
How long will ti take you to finish the work?
你要花多长时间才能完成那项工作？
The Native Americans caught and trained them and were then able to use them to carry their goods when they travelled from one camping ground to another.
美洲土著人捕捉野马，加以驯服。