用手比个五用英文怎么说

"To count on one's fingers" 意思是用手比个五。这个短语来自于人类最早的计数方式之一——用手指头来计数。人们可以用左手的五个手指来计数，也可以用右手的五个手指。

例句：

I had to count on my fingers to remember how many apples I had bought. 我不得不用手比个五才记得我买了多少个苹果。
She counted on her fingers to make sure she had enough money to pay for the groceries. 她用手比个五确保自己有足够的钱来付杂货店的帐单。