掌握英语发音 第一章 第三节

　　[00:00.00][s],[ ]&[ ]
[00:38.61]sea/sheet/chicken
[00:42.66]Exercise One: Word Conparison
[00:47.62]Listen to the following words from your tape and repeat.
[00:52.98]sip  ship  sane  shane  watched  washed
[01:01.23]lass   lash   least   leashed    chin
[01:09.09]shin  cheap  sheep   matching    mashing¹
[01:17.35]Exercise Two: Tongue Twisters
[01:24.43]Say these tongue twisters out loud to practise the sounds [s],[ ]&[ ]:
[01:33.68]She sells seashells by the seashore.
[01:39.63]The shells she sells are surely seashells.
[01:44.99]So if she sells shells on the seashore, I'm sure she sells seashore shells.

1 mashing   

捣碎

参考例句：

• Long ago, they served as a useful third set of mashing molars. 许多年前，它们可是有用的第三套磨牙系统。
• During continuous mashing, filter 2 is filled when filter 1 is full. 在连续糖化过程中，当压滤机1填满后即填充压滤机2。