叶背面具一不规则的不连续的毛被。
Abaxial leaf surface with a patchy discontinuous indumentum.
有稀少似羊毛的绒毛层的小枝；叶背面脉具白色的毛和具具稀疏蛛丝状毛。
Branchlets with sparse woolly tomentum; abaxial veins of leaves with white hairs and with sparse arachnoid tomentum.
采用数值模拟的方法，研究了涡轮叶片尾缘斜劈缝气膜冷却的流场特性，及其对叶背面尾缘温度分布的影响。
Numerical methods are used to investigate the film cooling effect of turbine guide vane's trailing edge.
结果表明，桃蚜和萝卜蚜两种菜蚜，主要在嫩叶和老叶的背面取食，成叶背面也有一定数量，但萝卜蚜在成叶上的发生比率较桃蚜明显要高。
The results showed that the two aphids, namely Myzus persicae and Lipaphis erysimi, mainly fed on the underside of young and old leaves.
叶：倒卵状匙形，尖，1.5 -3厘米长，0.8 - 2.5厘米宽（在最宽的部分），叶为带有白霜的蓝灰色，叶背面常有红色斑点，叶缘红色。
Leaves obovate-spatulate, cuspidate, 1,5 – 3 x 0,8 – 2,5 cm wide at the widest part, glaucous bluish-grey, often red-flecked beneath, margins reddish.
叶密被长硬毛背面的特别是在脉上。花对生。显著被微柔毛有环的花冠筒在里面。
Leaves densely hirsute especially on veins of abaxial surface. Flowers opposite. Corolla tube conspicuously puberulent annulate inside.
叶互生，革质，椭圆形或倒卵状长圆形，长7-15厘米，宽5 -8厘米，全缘，背面密被灰色短绒毛。
Leaves alternate , leathery , elliptic or obovate - oblong , 7 - 15 cm long and 5 - 8 cm wide , entire , densely grayish tomentellate.
叶互生，革质，椭圆形或倒卵状长圆形，长7-15厘米，宽5 -8厘米，全缘，背面密被灰色短绒毛。
Leaves alternate , leathery , elliptic or obovate - oblong , 7 - 15 cm long and 5 - 8 cm wide , entire , densely grayish tomentellate.
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