例句與造句

1. Hole excavating work to benefit sling passing is an essential procedure for wreck salvaging . at present the task is performed by divers with the mud penetrator , which is laboursome , inefficient and hazardous
   攻打千斤洞是沉船打撈作業(yè)中的一項關鍵工序，即在沉船底部清理出一條穿引抬船用鋼纜的通道。
2. It's difficult to find mud penetrator in a sentence. 用mud penetrator造句挺難的