Polyliner
多孔衬套
🗣️ 情景例句
It's ten after six. We're late.
现在是六点十分。我们迟了。
Your work seems not satisfactory.
你的工作看起来并不令人满意。
The comparable speed from the Moon is only 1.5 miles per second.
而从月球出发的相应速度只是每秒1。5英里。