本集核心英语单词及例句：

1.color idiom 颜色成语
Today we are going to discuss about the color idioms.
今天我们要来讨论一下有关颜色的成语。

2.out of the blue 出乎意料
Her husband appeared out of the blue.
她的丈夫出乎意料地来了。

3.knock (v.)敲；打；敲击
Knock before you enter.
进来前先敲门。

4.expected (adj.)预期的；预料的
The work is making as much progress as can fairly be expected.
这项工作现在进展得正如预期的那样快。

5.fall out of the sky 从天而降
Destiny doesn't come by falling out of the sky.
命运不会从天而降。

6.definitely (adv.)清楚地，当然；明确地
It has not yet definitely settled.
这事还没有明确解决。