Rackwork
齿条, 齿条加工, 齿条机构
🗣️ 情景例句
I've been there several times.
我到那儿去过好几次。
It's a beautiful country with forests, mountains and deserts.
这个国家很美，它有很多森林、山和沙漠。
Are they from Australia?
他们是来自澳大利亚吗？