这次火灾事故中，消防员们的英勇表现对森林保护产生了很大影响．他们是我们的英雄．
In the fire accident，the firemen's bravery to our forest protection．They are our heroes．
Don't swim in the river.It's （危险的） for you.
The （人口） of China is about 1.41 billion in 2021.
Many people think computers and the Internet will （取代） books.
They'd like to go sightseeing （而不是） of staying at the hotel.
Chinese scientists （发送） a spaceship to the planet Mars to take photos in July 2020.
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