...f trace amount of poisonous susbstances in milk and meat products is to be popularized in a country embarrassed by the scandals of clenbuterol and melamine contamination in food.请问"tace amount"前面为什么可以不加不定冠词"a"？
长难句成分分析Now last week, when we discussed the serious energy challenges we're going to face / as the world's population continues to grow and we place more stress on our finite supply of fossil fuels- especially natural gas and oil- well, maybe it's not all doom&nbs...
...ould recognize it as familiar territory. Well, I had been wrong, for I was now lost.I
looked at the map and then at the millimeter. I had come ten miles since
leaving the town, and at this point, according to my father, I should be looking at farms and
cottages in a valley, with the spire of the chu...
...nchester 1、Guardian from 1917 until shortly before his death in 1975, is now known solely as a writer of essays onthe game of cricket.2、He has been the manager of the company until fairly recently 问题1 ：请教曹老师，句子1,2中的until是个介词还是一个连词（conj)呢？如...
...物种，甚至可能导致另一个物种灭绝。FEMALE PROFESSOR: Now, one of the early criticisms of Gause's hypothesis was that, "Sure, it works in simple lab experiments, where you have just two competing species in a controlled environment.教授: 对于高斯假设的早期批...
Nowadays, with the rapidly growing popularity of mobile-based social network platform, there is a growing concern over disadvantages of mobile social networking.
...出自牛津第九版）（1）Nothing but a miracle can save her now.现在只有出现奇迹才能救活她。（2）I want nothing but the best for my children.我只想给我的孩子最好的一切。1、英英释义中给的解释是only；no more than；no less than。可是no ...
...者的语言中仍然找不到这些声音。 This research overturns thepopular view that all human speech sounds were present when human beings evolved around 300,000 years ago. “The set of speech sounds we use has not necessarily remained stable since the appearance of human beings, but rathe...