three rowadj.三行的threenum.三n.三；三个adj.三个的three-legged stick三脚手杖three-level system三能级系统three-bladed rotor三叶片风轮three-side trimmer三面裁切机three-orientations三个面向three-button mouse三钮鼠标three-stage device三级火箭three gun color tube三枪彩色显像管three-year college高职高专three - initiative三自主

1. Memory was intact to three of three objects at three minutes.
   三分钟内对三个物体的记忆是完整的。
2. If these two bodies were isolated in deep space, their close encounters would be symmetrical in space and time.
   如果太空中只有这两个物体，它们的相遇在时间和空间中会是对称的。