1·Her sudden disappearance was a complete mystery.
他的突然失踪是一件不可思议的事。
2·We are puzzled by the sudden disappearance of our guide.
我们对向导的突然失踪感到大惑不解。
3·We were puzzled by the sudden disappearance of our guide.
我们对向导的突然失踪感到大惑不解。
4·The scale on which his studies proceeded was so large as to require longevity, and we were the less prepared for his sudden disappearance.
他研究的范围是如此广阔需要很长的生命来延展，我们还对他的离去没做好准备。
5·Their thirst for hunting is blamed by some experts for the sudden disappearance of mammoths, mastodons and other large 'megafauna' mammals from the continent.
一些专家指责，这些克劳·维斯人对狩猎的渴望是猛犸象、乳齿象以及巨型哺乳动物群从大陆突然消失的原因。
6·The Rat hummed a tune, and the Mole recollected that animal-etiquette forbade any sort of comment on the sudden disappearance of one's friends at any moment, for any reason or no reason whatever.
河鼠哼起了一支小曲儿。鼹鼠想起，按动物界的规矩，要是你的朋友突然离去，不管有理由还是没理由，你都不该随便议论。
7·Last weeks sudden and total disappearance of Ruby developer and artist _why has caused quite a stir in the Ruby community.
上周Ruby开发者和艺术家_ why的突然失踪导致了Ruby社区的不安。