Clothespins have been used for many years to pin laundry to clotheslines so they can dry in the sun.

晒衣夹多年来被用在将衣物固定在晒衣绳上，好让阳光晒干衣物。

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He and Trujillo went back and pored over the older images to help pin down the circular path it travels around the sun.

他和Trujillo回去反复研究了这些老图片以帮助他们确定它环绕太阳公转的轨道。

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Unlike Antarctica, which is protected by an international agreement, numerous countries lay claim to parts of the Arctic, which makes it hard to pin down exactly how many tourists visit the region each summer, when the sun does not set below the horizon and the ice melts enough to allow expedition ships passage to the remote wilderness.

BBC: Life in the fragile, frozen Arctic