这些条件有助于进化出用于支撑枝干的结构、运输水分和养分到植物各部分的导管以及储存水分的结构。
These conditions favored the evolution of the structures that support the body, vessels that transport water and nutrients to all parts of plant, and structures that conserve water.
每个部件的整个重量由它的表面支撑，比较厚重的部位让人联想起承受大部分重量的导管结构。
The entire weight of each object is supported by its skin, with thicker areas that are reminiscent of natural vascular structures bearing most of the load.
如果支撑设施不够完善，应使用通道、角铁、导管或管道对单独导压管进行连续支撑。
Where this facility is not available, individual tube runs shall be supported continuously in channel , angle iron , conduit or pipe.
应用推荐