much-needed

翻译：东京将在 2020 年举办奥运会，这将为当地经济注入亟需的活力。

The Tokyo Japan will hold Olympics in 2020 that will injection a much-needed boost vitality for the local economy.

造句一：参考翻译：Tokyo will hold the 2020 Olympics, which will provide a much-needed boost to local economy. 或 The 2020 Olympics will provide Tokyo, its host city, a much-needed opportunity to revive its economy.

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形容词 ：亟需的”，可以表达出类似中文成语“雪中送炭”的迫切性。

它后面一般接 support, assistance, improvement, boost, reform 等词