Topslicing
下行水平分層崩落采礦法
??? 情景例句
Stone is still in the hospital, but he's making good progress.
世通還在醫院，但他的身體康復得很快。
What we learn with pleasure we never forget.
樂意學的東西決不會忘記。
However, there are undoubtedly some wrong ways,
然而，卻毫無疑問地有幾種錯誤的方法。