We need principals from all stakeholder groups in Davos to summon the imagination and commitment necessary to tackle the problem.请问 necessary to tackle the problem 作什么成分?
...句子中的 language 是不可数的——因为它前面没有用冠词和物主代词,本身也没有用复数:Many people think that children learn language by imitation. 很多人认为儿童通过模仿学语言。我的疑问是:如何区别分 language 何时可数何时不可数?上...