他首先得弄清一些基本事实。He first had to get hold of some basic facts.弄清他在干什么是重要的.It's important to find out what he is doing.这些注释有助于弄清文中最难懂的部分.The note help to elucidate the most difficult parts of the text....
I felt obligated to let him read the letter...我觉得有义务让他看到这封信。Normally, the seller is obligated to prepay the ocean freight.通常情况下, 卖方有义务预付海运费.He felt obligated to help.他觉得有义务帮忙。Under a separation agreement, he was obligate...