名词
中文翻译：预备洞
同义词：
['preparatory hole', 'prepared pit']
例句：
-
1.The explorers had to dig a prepared hole to set up camp.
探险队不得不挖一个预备的洞来设立营地。
-
2.The miners had to prepare a prepared hole for their next shift.
矿工们必须为下一班准备好一个预备的洞。
-
3. The engineers had to prepare a prepared hole for the new tunnel.
工程师们必须为新的隧道准备好一个预备的洞。