美国多个地区知了成群

词汇讲解：

1. notoriously adv. 著名地,众所周知地
例句：Birth rates are notoriously difficult to predict.
众所周知，出生率是很难预测的。

2. bug n. 虫子, 小昆虫
例句：The sacks of rice were swarming with bugs.
一袋袋的米里长满了虫子。

3. emerge vi. 出现; 显出; 暴露
例句：It emerged that her past behaviour was far from irreproachable.
事实表明, 她过去的行为绝非无可非议。

4. tickle v. (使)发痒
例句：Babies want to be tickled and hugged.
婴儿喜欢轻轻呵痒和紧紧拥抱。

5. rot v. (使)腐烂, (使)腐朽
例句：Dead plants rot and become part of the soil again.
枯死的植物腐烂, 又成为土壤的一部分。

6. amplify vt. 增强
例句：They amplified their sound.
他们提高了嗓门。

7. rudimentary adj. 基本的, 初步的
例句：I have only a rudimentary knowledge of chemistry.
我只有些粗浅的化学知识。

8. visible adj. 看得见的, 可见的, 有形的
例句：It is a visible star in the sky.
这是一颗在天空中可见的星星。

9. diameter n. 直径
例句：The circle has a diameter of 6 inches.
这个圆直径六英寸。

10. vulnerable adj. 易受伤的, 脆弱的, 敏感的
例句：He volunteered to protect her as she looked so vulnerable.
她看上去很脆弱, 他就主动去保护她。

11. hatch v. 孵化,破壳
例句：A hen hatches chickens.
母鸡孵化小鸡。

12. peak vi. 达到高峰, 达到最大值，达到最高值
例句：Toy sales peaked just before Christmas and are now decreasing.
玩具销售额在圣诞节前夕达到最高峰, 现已逐渐下降。