时间与空间的弯曲贯穿整个宇宙，其中的起伏就是重力波，它自起源处向外散发。
Gravitational waves are fluctuations in the curvature of space and time which propagate through the universe as gravitational waves — outward from its source.
这将依赖AIG的表现和最近起伏不定的市场环境(见证了一波公开募股行为的取消或推迟)。
That will depend on AIG's performance and on market conditions, which have been choppy of late (witness the wave of cancelled or postponed public offerings).
但是在将近1亿年前，现代蛇类的近亲们靠着它们船桨似的尾巴在白垩纪的水流里随波起伏，拖曳着它们短小而笨拙的后腿。
But nearly 100 million years ago relatives of modern snakes undulated through Cretaceous period waters aided by a paddlelike tail and dragging a pair of short, footless hind legs.
应用推荐