More recently, however, our sun has become increasingly active and exhibiting a greater abundance of sunspots, flares, and coronal mass ejections.

但是最近，我们的太阳变得活跃起来，其表面出现了大量的黑子，耀斑以及日冕物质抛射。

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Although it was 54 years before the Supreme Court declared another law unconstitutional, it has become increasingly active since the middle of the 20th Century, especially in the area of civil rights.

虽然在“马伯里诉麦迪逊案”之后的54年中，被最高法院宣布立法违宪的情况仅再出现过一次，但是，自20世纪中期以来，最高法院承担起越来越积极的作用，在民权领域尤其如此。

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Circulant matrices, which are an important component of the matrix theory, have become one of the most important and active research fields of applied mathematics increasingly.

循环矩阵是矩阵理论的一个重要组成部分，且日益成为应用数学领域中一个非常活跃和重要的研究方向。

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However, recently, environmental officials have become increasingly active in blocking new industrial development.

FORBES: Pollution And Prosperity

Young European collectors have also become increasingly active, he adds.

FORBES: Billionaires, Collectors, Celebrities And Artists Gather At Art Basel

Ozertem told CNN he is unaware of any links between DHKP-C and al Qaeda-type actors, but the possibility can't be entirely dismissed because al Qaeda sympathizers have become increasingly active in the region.

CNN: Turkish attack a reminder of Cold War dynamics