Necessity is indeed the mother of invention.

语音讲解
单词发音
necessity n.需要；必然性；必需品
necessary adj.必要的；必需的；必然的
necessarily adv.必要地；必定地，必然地
invention
连词发音
necessity is indeed
mother of invention
轻读重读
重读：necessity indeed invention
弱读：is the of

词汇讲解
necessity is the mother of invention
需求是创造之母。
necessity 需求 需要
She saw books as a necessity, not a luxury.
她认为书籍是必需品，而不是奢侈品。
A lot of families cannot even afford to buy the basic necessities of life.
很多家庭甚至买不起基本的生活必需品。
daily necessities/basic necessities of life 日常生活必需品
场景：
A: "I needed to drain the washing machine to try and unblock it, so I used an old bike tube to funnel the water out the back door."
为了通下水道排水，我把旧自行车胎做成了漏斗形状，让水顺后门流出去了。
B: "Wow, necessity is the mother of invention, huh?"
需求是创造之母啊！
句式： Failure is the mother of success.
失败是成功之母。

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