1. Very excited, the party dug a hole two feel deep.
队员们异常激动，就地挖了一个两英尺深的坑。
知识点1：very excited为过去分词作状语，补充完整是：They were very excited, and the party dug a hole two feet deep.
知识点2：two feet deep为“数词+量词+形容词”结构，在句中既可以作定语（一般用连字符连接），也可以作表语。例：
There is a five-metre-wide street.
这里有一条五米宽的大街。
The street is five-metres-wide.
这条街有五米宽。
2. A new machine called "The Revealer" has been invented and it has been used to detect gold which has been buried in the ground.
一种叫“探宝器”的新机器已经发明出来，人们用它来探測埋藏在地下的金子。
知识点：called在此是过去分词短语作后置定语。
3. The party then searched the whole cave thoroughly but did not find anything except an empty tin trunk.
队员们接着又把整个洞彻底搜寻了一遍，但除了一只空铁皮箱外什么也没找到。
知识点：excqpt an empty tin trunk 除了一只空铁皮箱外
4. The pirates would often bury gold in the cave and then fail to collect it.
海盗们过去常把金子埋藏在那个洞里，但后来却没能取走。
知识点：fail to collect表示“没能取走”。
