2018-12-13每日一词much-needed

1）翻译下面的句子：

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。

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.

2)情景 一场雪可以尽快改善空气质量。

Snow is coming tomorrow, which will provide a much-need improvement to the air quality.