Sensitized and challenged animals had significantly increased AR to aerosolized methacholine compared with control animals.激发致敏后的动物雾化吸入乙酰胆碱后较对照组有显著的气道反应性增高....
由此你可以算出银河系的总质量。From this you can calculate the total mass in the Galaxy.银河系由1,000亿颗恒星组成。The Galaxy consists of 100 billion stars.地球是银河系中的星球之一.The earth is one of the planets in the Galaxy....
an infrequent guest稀客Some words are too infrequent to be worthy of inclusion in the dictionary.一些单词的使用频率太低，没有必要收入词典。Barriers between nations are reared by slow and infrequent communication.国与国之间的隔阂是由沟通缓慢而又太少形成的....John&#...