Until recently no-one knew what was driving the solar cycle.
我们到最近才得知太阳周期的原理。
单词 | driving cycle |
例句 |
原声例句
BBC纪录片《太阳之谜》 Until recently no-one knew what was driving the solar cycle. 我们到最近才得知太阳周期的原理。 |
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