1、This is the biggest contraction of the thermosphere in at least 43 years.
這是至少在43年中最大的熱大氣層收縮。

2、Still, the collapse of the thermosphere was bigger than the sun's activity alone can explain.
盡管如此，該熱層塌陷是比太陽的活動可以解釋的理由還要劇烈。

3、After the thermosphere is the thermopause, which is the outer most boundary of the thermosphere.
熱成層之后是熱成層頂，它是熱成層的最外邊界。