And base on the experiment, calculating formula of cross section mean velocity's reduction after planting and bed shears stress of vegetation dam block are established.
同时在试验的基础上，推导得植树后断面平均流速减小值和植物坝段床面剪应力的计算公式。
For planting trees that block the lookout of the running train, the MCTA shall order the pruning or removal of such trees within a time limit.
种植妨碍行车望的树木的，由市交通局责令限期修剪或者迁移。
If it's climate appropriate, planting deciduous trees such as maple, oak, or elm will provide shade in the summer to save on AC, while being leafless in the winter to not block the sun.
如果气候适宜的话，你可以种些每年落叶的树，比如说枫树，橡树，或者榆树，这样在夏天的时候就可以乘凉从而减少使用空调，并且在冬天树叶落光了也不会挡住太阳光。
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