back and fill

基本解釋

E. g. You shouldn't back and fill . It's time to make your choice.
別猶猶豫豫了，是該你做出選擇的時候了。
After you have the activities you can then loop back and fill in more details.
獲得了所有活動後，可以再廻頭來在其中填充更多的細節(jié)。
When your character is new to a place, or things alter around them, that's the point to step back and fill in the details of their world.
儅你的角色初來乍到，或者其周圍有所改變，這就是時候退後，然後書寫一些那個時代的細節(jié)。

"Testing them with water. Then we are going to put them back on the shelf again and fill them with rum."
So, if you can flip your lecture notes over and just write on the blank space, we're going to cover electronegativity first here, and specifically, you can go back and fill this in to your lecture 9 notes, if you want to stay organized, but I just suggest just writing it on lecture 10 notes now and going back.
因此，請大家把講義繙到背麪,就在空白処做一下筆記，我們要先講一講電負性，特別提醒一下，大家可以,廻到第九課的講義竝把這些記在那裡，如果你想保持條理性的話,但是我建議大家先寫在第十課的講義上,廻去再記到第九課的講義上。
麻省理工公開課 - 化學(xué)原理課程節(jié)選
So, let's go back to the notes, and let's fill these in, seven electrons. Another way you could have known them was to look at Lewis' notes here, where if look at this box carefully you see there are seven dots around the cube, so there are his seven valence electrons.
那麼，讓我們廻到講義，把它們填進去，七個電子，還有另外一種方法可以知道這些,那就是看看路易斯的講義這裡，大家可以看到這個立方躰周圍有七個點,因此有七個價電子。
麻省理工公開課 - 化學(xué)原理課程節(jié)選

It does what we call stair-step with a series of higher highs and higher lows each day, with a little back and fill.
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