selection [s?'l?k??n]

n. 選擇;被選中者;可供選擇的事物;

se分開+lect選擇，收集+ion表名詞 →select分開選=選擇+ion表名詞 → 選擇

sequence ['si:kw?ns]

n. [數]數列，序列;順序;連續;片斷插曲; vt. 使按順序排列，安排順序;[生化]確定…的順序，確定…的化學結構序列;

A serious matter.

一個嚴重的問題。

Who is the author of this novel?

這篇小說的作者是誰？

We set off down the hill. At first it was easy walking over the grass. Then the grass turned to bushes and the hillside became steeper. We climbed over rocks, through trees and found it more and more difficult to get down the hill. By now we were beginnin

我們開始下山，起初很容易地走過草地，后來草地變成了灌木叢，山峰變得更陡了。我們爬過巖石，穿過樹林，發現下山越來越難。這時我們感到疲憊，雨也下大了。我在一小塊草地上停下來，轉身看看跟在我后面的弟弟。就在這時我在兩塊巖石中間發現了一個洞。“我過去看看，”我喊?2282