tunnel是什么意思

用法例句

By using the moveable-bottom hive in the cave and tunnel to raise Chinese bee,it can improve the ecological condition in the bee nest,delay the occuranee of swarming and keep stronger bee colony.

利用土坑,土洞活底简易中蜂箱活框饲养中蜂,可明显改善箱内生态环境,延迟分蜂热的发生,维持较大的群势,坑内饲养表明可提高产蜜量和蜂群造脾数,并且能有效地抑制巢虫等虫害的活动。

Effects and mechanism of the holes digging method in the process of vegetation restoration in Macao;

澳门植被恢复过程土坑法的效应机制探讨

The paper introduces the way to calculate the pit elevation of borrow pits by computer.

介绍一种运用计算机程序预求大堤所对应取土坑坑底高程的方法 。

In strengthening of Baitukeng Reservoir,the dam slope was paved with composite geomembrane,while the dam foundation was paved with plastic film in v.

在白土坑水库加固中,坝坡铺设复合土工膜,坝基进行垂直铺塑并将两者连为一体。