We know that you are leading exporters of coal and you can provide the quantity we need.
我们知道贵方是主要煤炭出口商,能满足我们的需求量。
Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
人一旦能用语言同别人交流思想,知识的积累便开始了。