The technical superiority of laser discs over tape is well established.
光盘相对磁带在技术上的优越性是确定无疑的。
Once there, they use tape measures, callipers and a hand-held laser to measure the heights and girths of all the trees within a 500-square-metre plot.
到达目标后，在圈定好的500米区域内，他们用卷尺，测径规和手持激光设备对所有树木的高度和树围进行测量。
Once there, they use tape measures, callipers and a hand-held laser to measure the heights and girths of all the trees within a 500-square-metre plot.
到达目标后，在圈定好的500平方米区域内，他们用卷尺，测径规和手持激光设备对所有树木的高度和树围进行测量。
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