Preorder traversal
[計] 前序遍歷
?? 詞語組成解析
[計] 先根次序
[計] 遍歷
??? 情景例句
Dad saved him, not me.
是爸爸救了他， 不是我。
I've studied the reports of past meetings.
我學習了以往的會議記錄。
These drawings on the wall are process sheets.
墻上的圖表是工藝流程表。