You count such a watch by the time he starts his class.

你总是掐着他开始上课的时间。

youdao

She is so busy that she seldom has time to take care of her 2-year-old son, so she needs an app for him to learn to speak and count.

她太忙了，很少有时间照顾她两岁的儿子，所以她需要一个应用程序让他学习说话和数数。

youdao

I count he runs fifteen or sixteen circles, even near twenty circles one time.

我估计他一次要跑十五六圈，或二十圈。

youdao

And frankly it would be incredibly time-consuming and tedious for me, to count this room full of people old school style-- 1, 2, 3 and so forth.

坦白说，按学校的老办法一个人一个人的数,1个，2个，3个……,对我来说极其费时费力。

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