Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts.
一些仙人掌，如撒瓜罗，能长到象树那么高。但真正的树却需要比大多数沙漠所能提供的更多的水份，所以树在沙漠里是鲜见的。
Obviously both rootstock and cultivar will have a pronounced bearing on tree size at maturity.
很明显，砧木或栽培品种都能对成龄植株的树形大小发生深刻的影响。
This research is the basic subsystem of forestry stereo vision system, which makes automatic tree size measure become reality to improve the efficiency and precision of the forestry measure work.
本文是林业立体视觉测量技术研究的一个基础部分，林业立体视觉测量技术的目的是实现测树自动化，以提高测量的效率和精度。
This research is the basic subsystem of forestry stereo vision system, which makes automatic tree size measure become reality to improve the efficiency and precision of the forestry measure work.
本文是林业立体视觉测量技术研究的一个基础部分，林业立体视觉测量技术的目的是实现测树自动化，以提高测量的效率和精度。
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