很多人认为地球绕太阳的轨道是完美的圆形，就像手在一块制作精良的手表上移动那样平滑、有规则，但事实并非如此。
A lot of people think of earth's orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn't work that way.
机器人臂绕枢轴转动并伸直，好像伸出它的机械手。
It pivots around and straightens as it extends its mechanical hand.
天真的想法在我脑子里绕来绕去，便拉住妈妈的手说： 黦“妈妈，我也想要一双溜冰鞋，给我买吧！”
Naive and round in my mind, then held mother's hand and said: "mom, I also want a pair of skates, buy me! ""
奥运火种将由来自希腊奥林匹亚的最后一位火炬传递者带入会 场，火炬手 绕 场一周，登上台阶，点燃圣火。
The Olympic flame is then car-ried into the stadium by the last of the runners who have brought it from Olympia, Greece.
奥运火种将由来自希腊奥林匹亚的最后一位火炬传递者带入会 场，火炬手 绕 场一周，登上台阶，点燃圣火。
The Olympic flame is then car-ried into the stadium by the last of the runners who have brought it from Olympia, Greece.
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