So the study on the deep back filling technology has great significance in mining practice.
因此，研究深井充填技术具有重大的现实意义。
The back filling behind abutment in express highway is main constituent of highway construction.
高速公路结构物台背回填是高速公路建设的重要组成部分。
Please read the instructions at the back before filling.
请在填写之前阅读背面说明。
You can get a back issue by filling out a slip for the librarian.
要借一本过刊，你可以详细填写一张索书单交给管理员。
Patient: There's a hole in my back tooth, and a filling has fallen out.
病人：我后面这颗牙有个洞，里面补过的填充物掉出来了。
Come back in two weeks for the permanent filling.
两周后再来做个永久性的填充。
Back -filling the SF6 gas into the switch.
能对SF 6电器开关的气体进行回收。
So here I am filling in for him until he... Well, if he gets back.
所以我来代课直到…如果他会回来的话。
No, she is just filling in until Miss Brown gets back from her holidays.
不，她是临时代的，布朗小姐度假去了。
No, she is just filling in until Miss Brown gets back from her holidays.
不，她是临时代的，布朗小姐度假去了。
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