宇宙广袤无边，因此许多科学家坚信生命的进化无处不在。
The universe is immense, which makes many scientists confident that life might have evolved elsewhere.
“因为——”他犹豫了。整个广袤无边的文学和文学史天地在他的头脑里悸动，它告诉他不可能跟她说清他为什么会有信心。
"Because -" he faltered as the whole vast field of literature and the history of literature stirred in his brain and pointed the futility of his attempting to convey to her the reasons for his faith.
银河系广袤无边，跨度达10万光年，拥有4000亿颗恒星，不过只要有充足的时间和坚定的决心，一个文明可以走得很远。
The Milky Way is huge—about 100, 000 light years across—and contains 400 billion stars, but given enough time, a determined civilization could spread far and wide.
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