Thumbprint
n. 拇指指纹\\n[医] 拇指纹
✅ 同义词
🗣️ 情景例句
I'll help.
我也来帮忙。
The staff in this shop is very helpful.
这家商店的店员很热心。
The letter x stands for an unknown number.
字母x代表未知数。