Mechanical friction
[化] 机械摩擦
🧩 词语组成解析
🗣️ 情景例句
Have you ever done any correspondence work?
你有处理文书的经验吗？
Why did you sit up so late?
为什么你这么晚还不睡觉？
He was just able to lie down on the ground, but could not stand up.
他只能躺在地上，但不能站起来。