Others show extreme close-ups of activity on the Sun’s surface.
其它一些图片则给太阳表面的极端活动做了特写。
On the surface, it might appear as if this is a difficult or esoteric activity.
表面看来，这似乎是一个很困难或者机密的活动。
The results show that the BDSA salts have high surface activity.
结果表明BDSA盐具有较高的表面活性。
The results show that the BDSA salts have high surface activity.
结果表明BDSA盐具有较高的表面活性。
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