1855C. R. Lepsius Stand. Alphabet 39, h belongs, therefore, to the unvocalised strong fricatives.
1878J. S. Bristowe Th. & Pract. Med. 477 The result is that unvocalised air escapes through the chink.
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。