main stem中文什么意思

n.
主流；主要倾向；(事物的)极富于生命力的部分。

• main:    adj. 1.主要的，主，全，总。 ...
• stem:     stem2 vt. (- ...
• enlarged fleshy main stem:    粗壮的肉质主茎

例句与用法

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1. The main stem of a tree is a tapering geometric solid .
   树木的主干是一种有消度的几何体。
2. The main stems of a plant show negative geotropism as they grow upwards .
   植物茎往上长时表现出负向地性。
3. The main stem and fruiting branches of determinant types remain relatively short .
   有限生长类型的主茎和果枝仍然较短。
4. Subsequent growth of some of the axillaries results in first-order branching of the main stem .
   一些腋芽继续生长形成主茎的第一级分枝。
5. The main stem heat input construction of tangshan and jianhua street
   建华道主干线供热工程施工

百科释义

In hydrology, a main stem is "the primary downstream segment of a river, as contrasted to its tributaries".Benke and Cushing, p.