virtual
no-go areas for the security forces.
Scientists in France and the United States say they've discovered an important clue as to why ammonites, the prehistoric marine creatures,
died out
with the dinosaurs, despite having survived previous mass
extinction
s. The study, published in the journal Science, suggests that the ancient invertebrates' main diet was zooplankton, which are tiny ocean surface creatures. The production of these is likely to have been damaged by the comet strike, believed to have wiped out the dinosaurs.
BBC News
1.ballooning adj.膨胀的
2.cumbersome adj.沉重的, 笨重的, 转动不灵的,大而笨重的;难以携带的
例句:It’s rather cumbersome having to carry all these cases around.
把这些箱子都带着走动是件相当麻烦的事。
3.agile adj.(动作)敏捷的,灵活的
例句:She is such an agile dancer!
她跳起舞来是那么灵巧!
4.restrain vt.抑制, 遏制; 管制, 克制, 约束
例句:If you can't restrain your dog you must lock it up.
如果你无法管住你的狗, 就必须把它关起来。
5.install vt.安装,安置,使就职
例句:He's going to install an air-conditioner in the house.
他要在这屋子里装冷气机。
6.solidarity n.团结,团结一致,共同一致