痕迹器官：一些没有功能，体积缩小但与相关物种的相应功能完全的器官具有一定相似性的器官。
provided by jukuu
The decorative button on the shirt is functionless but adds a nice touch.
衬衫上的装饰钮扣虽然没用，但增添了一丝美感。
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The functionless appendix in humans is believed to have had a purpose in the past.
人类身体中的盲肠虽然没用，但据信过去曾有一定作用。
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The toy car he bought for his son was broken and functionless upon arrival.
他给儿子买的玩具车到货后已经坏掉了，没法玩了。
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The feature was eventually removed from the app, as it was found to be functionless.
该特性最终被从应用中删除了，因为它被发现没有任何作用。
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The old elevator in the building has become functionless and needs to be replaced.
大楼里的旧电梯已经没用了，需要更换。
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The outdated software on my computer has become functionless and won't run properly.
我电脑上过时的软件已经失去了功能，无法正常运行。
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经过多年的日常使用，我的手机充电器已经失去了功能，无法正确给手机充电。
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he batteries in my flashlight have become functionless and need to be replaced.
我的手电筒电池已经没用了，需要更换。
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The drain in my sink has become functionless and won't drain water properly.
我水槽里的排水口已经失去了功能，无法正常排水。
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