We usually accept payment by irrevocable L C payable against shiping documents.
我们一般用不可撤销信用证,凭装运单据结汇付款方式。
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。