Skin friction
[化] 表面摩擦
🧩 词语组成解析
skin
[skɪn]
n. 皮，皮肤;（蔬菜，水果等）外皮;毛皮;
vt. 剥皮，削皮;擦破皮，擦伤;欺骗;
vi. 使愈合，长皮;
adj. <俚>色情的;
🗣️ 情景例句
Good-bye.
再见。
These clothes are very beautiful, but I can't afford to pay that much.
这些衣服很漂亮，但是我买不起。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。