这个选择符用于选择出特定的单一元素；id在一个文档中应该是惟一的。
This selector is used to single out a particular element; IDs should be unique within a document.
史密斯教授说，说出维生素b确切如何起作用，目前还为时尚早。
Prof Smith said it was still early to say exactly how vitamin B worked.
在长时间里，可能发明出一种药物，就是能抑制胸腺基质淋巴细胞生成素的产物或者干扰肺部里的胸腺基质淋巴细胞生成素感受器分子。
In the longer term, it might be possible to devise drugs that inhibit the production of TSLP or interfere with TSLP-receptor molecules in the lungs.
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