By reflecting a laser beam from a specially designed hologram (shown here as the colored circle), physicists created knots of dark filaments (represented by the colored knot).
通过从来自一个特殊设计的全息图(这里用彩色圆圈来表示)的激光光束的反射，物理学家创造了(用彩色结来表示)暗丝结。
Depending on the nature of the reflecting objects, the intensity of the reflected beam will vary.
随着反射目标的性质不同，反射回来的波束强度也就不同。
Beam riding systems use a target tracker whose purpose is to maintain the antenna boresight pointing at the centre of the reflecting area of the target.
波束制导系统使用一个目标跟踪装置，它的目的是保持天线视轴指向目标反射的中心。
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