back fill

基本解释

It is shown that large cylindrical structure is applicable to weak foundations with back fill, and that shear structure is superior to flexural structure.
主要结果表明：大圆筒结构适用于有后方填土的软弱地基，剪切型结构优于弯曲型结构；
This paper states types of retaining wall back fill and relevant earth pressure calculation method, which is of direction significance for cast-in-palace construction.
本文对挡土墙填土的种类及相应的土压力计算方法进行了全面论述，对现场施工具有指导意义。
When I put them back fill after the envelope on the counter to put the letter in the time but couldn't find my letter.
当我把信封一一填好之后回到柜台上想把信装进的时候却找不到我的信了。

"Testing them with water. Then we are going to put them back on the shelf again and fill them with rum."
I want to back up now because I think it's important to fill in a little bit of the historical context behind that long but important prose treatise.
我想要退回去往前看是因为我认为,补充一些历史背景对于,解读那篇冗长却又很关键的政论是很重要的。
耶鲁公开课 - 弥尔顿课程节选
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.
那么，让我们回到讲义，把它们填进去，七个电子，还有另外一种方法可以知道这些,那就是看看路易斯的讲义这里，大家可以看到这个立方体周围有七个点,因此有七个价电子。
麻省理工公开课 - 化学原理课程节选

This new digital back can fill a staggering 80 million pixels with imaging data, thanks to its 53.7mm x 40.3mm-sized CCD sensor.
ENGADGET: Leaf Aptus-II 12 snaps 80 megapixels of awesome on the back of your pro shooter

to refill an excavated trench, esp (in archaeology) at the end of an investigation
the soil used to do this