笔画数的英文：
stroke number
n. 击球（动作）；划水动作；轻抚；抚摩；笔画；行动；钟声；中风
v. 轻抚，抚摩（物体表面或头发等）
- a butterfly stroke
蝶式游泳 - Her husband is a stroke.
她丈夫是个尾桨手。 - Who is the stroke of the boat.
谁是这艘船的尾桨手。 - He stroked the ball into the bag.
他轻轻一触，球就进袋了。 - An oak is not felled at one stroke
万事不能一蹴而就
n. 数；号码；算数
v. 给…编号；计算，数
- The number was fifty.
该数字为五十。 - There is safety in numbers
人多势众 - It was an irrational number.
这是一个无理数。 - Which number on the card is a prime number?
在卡片上哪一个数字是最初的数字？ - The number raised to the logarithm of a designated number in order to produce that designated number.
被升到指定数字的对数上的数量,是为了得到那被指定的数目。
