trench bottom堑壕: trench; entrenchment; pit底: bottom; base堑壕: trench; entrenchment; pit 堑壕工事 entrenchment works; 堑壕构造 [地] aulacogen; 堑壕战 trench warfare堑壕线: trench line堑壕战: trench warfare下载手机词典可随时随地查词查翻译