练习材料：
Lesson 46：Expensive and uncomfortable
任务配置：
L0+L1
知识笔记：
清辅音【ts】
上下齿自然合拢，嘴唇张开不要太大。舌端贴住齿龈，堵住气流。然后舌尖略微下降，气流随之泄出。
cats meets limits
浊辅音【dz】
舌端贴住齿龈，堵住气流。舌尖略微下降，气流随之泄出形成先破擦，同时声带震动发出/dz/音。
beds cards rides
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单词积累
confine
vt. 限制；禁闭
n. 范围；界限；约束；限制
I wish the speaker would confine himself to the subject.
我希望演说者不要离题。
I am sick, I have to confine to bed.
我病了，我得卧床休息。
The thief was confined in a prison.
窃贼被关押在监狱里。
Is it cruel to confine a bird in a cage?
把鸟关在笼子里残忍不残忍?
This is outside the confines of human knowledge.
这超出了人类知识范畴。
单词积累（from 口语粉碎机）
in/ out of running 有（或没有）成功的机会
Luck's carelessness has put him out of the running for the contest.
luck的粗心大意使他错失了这场竞赛的机会。
at any point 在任何时候
The reservation can be canceled at any point.
任何时候取消预订都没有问题。
It’s the thought that counts.
贵在心意。
