In my opinion, exertion should always be in proportion to what is required.

语音讲解：
单词发音
exertion /ɪɡˈzɜːʃən $ -ɜːr-/
proportion /prəˈpɔːʃən $ -ˈpɔːr-/
require /rɪˈkwaɪə $ -ˈkwaɪr/
连词发音
my opinion /maɪjəˈpɪnjən/
should always /ʃədˈɔːlwəz/
轻读重读
重读：my/exertion/required
弱读：should/to

词汇讲解
1. exertion noun.来源：exert verb.运用,用力
释义：a lot of physical or mental effort 努力; 费力
例句：The afternoon’s exertions had left us feeling exhausted.
整个下午的劳动让我们筋疲力尽。
2. in proportion to phrase.相对于某事物来说 与某事物成比例
释义：a part of a number or an amount, considered in relation to the whole 比率
例句：My expenses weren't really growing in proportion to my income.
我的开支和我的经济收入是完全不匹配的。
活学活用
in proportion to phrase.相对于某事物来说 与某事物成比例
英文：The size of the house is not in proportion to the garden.
中文：房子的大小与花园不成比例。
语法讲解
In the beginning was the heaven and the earth是一个介词短语前置的倒装句，起强调作用。
原句：The book was on the desk.
倒装：On the desk was the book.

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