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。
In 1929, three years after his flight over the North Pole, the American explorer, R.E.Byrd, successfully flew over the South Pole for the first time.
美国探险家 R。伯德在飞越北极3年之后,于1929年第一次飞越了南极。