再按两次回车将显示加法和减法表达式。

Pressing return a couple more times will show an addition and subtraction.

youdao

她像仙女一样轻快地走下田野时，两次回头盯着他；

She turned twice to gaze after him as she tripped fairy-like down the field;

youdao

但索德林的失误却浪费了这一机会，并以之后两次回球触网将冠军头衔拱手送出。

Soderling wasted that with a mis-hit and then netted a return into the net two points later to hand Federer the title.

youdao

Suddenly the vision begins to transform and he begins to hear the voice of Paul, "Thrice was I beaten, twice was I imprisoned, in shipwrecks often, in peril often."

突然之间，视觉的幻想开始改变,他听到了保罗的声音，“我被人打过三回，囚禁两次，经常受苦受难“

普林斯顿公开课 - 人性课程节选