Backfiller
[机] 回填机
🗣️ 情景例句
You're writing a book?
你在写一本书吗?
To hear a hundred times is not so good as to see once.
百闻不如一见。
many of them serious and senior scientists---- who dream of sending people to it.
其中的不少人是认真和资深的科学家，他们一直梦想着把人送上火星。