掐算

xì xì qiā suàn

细细掐算

carefully count on one's fingers

tā xì xīn qiā suàn dì yī liè huǒ chē jí jiāng tōng guò de shí kè

她细心掐算第一列火车即将通过的时刻。

She carefully figured out what time the first train would pass by.

mǔ qīn qiā suàn ér zi de guī qī

母亲掐算儿子的归期。

The mother was reckoning when her son would be back.

xiàn zài tā yǐ jīng kāi shǐ qiā suàn qǐ shí jiān lái

现在她已经开始掐算起时间来。

Now she begins to wonder about the time.