Jungle River Boat Safari, Tom Sawyer island and Bobsled Runs , I think, are all fascinating.我最欣赏乘小船在森林河道中穿梭探险, 游览汤姆莎耶岛和乘坐雪橇.But the players don't use skate, they use bobsled and hurtle down twisting course.但运动员不是穿冰鞋...
某些脉冲星发送脉冲比地球上最精确的时钟都准时。Some pulsars keep time better than the earth's most accurate clocks.他们发现了以往想象不到的新客体 —— 脉冲星 、 类星体和黑洞.They have discovered now , previou sly unimagined objects - pulsars, quasars, and black hole...