英语语法分析

From this he had drawn the inference that this person, once in the forest, had dug a hole with his pick, buried the coffer, and reclosed the hole with his shovel.

他从而作出结论，认为他那老相知在走进树林以后，便用他那把镐挖了一个坑，把他那箱子埋了下去，又用锹填上土，掩了那坑。