Hoarseness is very common in the winter season.冬季很容易哑嗓子。His hoarseness and coughing showed that he had contracted a cold.他嗓音嘶哑又咳嗽,这表明他患了感冒.Occasionally, recurrent laryngeal nerve involvement causes hoarseness.有时, 喉返神经受累引...
The plane left British airspace.飞机飞离了英国领空。The jet entered Chinese airspace without permission.那架喷气式飞机未经允许闯入中国领空。The glider was in Dutch airspace.滑翔机在荷兰的领空....
异氰酸酯可由含氯的环(或非环)状分子氟化而得.The isocyanates can be obtained by the fluorination of nitrogenous cylic or acyclic molecules.含氯量和孔隙度之间的关系图式也许近似于一条双曲线.The relation between the chlorinity and porosity may be approximated by a hype...