现在下方，右下方的下划线表示空白片，我可以用手指将4移下来，或者将2移到右边。

Now the bottom — the little underscore in the bottom right hand corner represents the blank tile and just as with my thumbs I would move 4 down or maybe 2 to the right.

youdao

用手指沾面粉戳入面团当中，面团将会随之凹陷下去，但是不会立即弹起或继续向下陷，这就表示头次发酵完成。

Coat your finger with flour and press your finger into middle of the dough, the indentation should remain visible for a few seconds.

youdao

搔脖子。用手指搔耳部下方或脖子一侧，每次约搔五下，表示怀疑或不肯定。当听到与事实不符的话时，这一动作最为常见。

Scratching one's neck: Using one's forefinger to scratch the lower part of the ear or one side of the neck for 5 times, it shows one's doubt or lack of affirmation.

youdao

- Now the bottom-- the little underscore in the bottom right hand corner represents the blank tile and just as with my thumbs I would move 4 down or maybe 2 to the right.

现在下方,右下方的下划线表示空白片,我可以用手指将4移下来,或者将2移到右边。

哈佛公开课 - 计算机科学课程节选