The service spillway had drains consisting of perforated pipes to relieve the pressure of water flowing beneath the slabs.
服务溢洪道设有由穿孔管组成的排水沟，以减轻板下方流过的水的压力。
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| 词汇 | Pressure flow |
| 分类 | 英语词汇 英语翻译词典 |
| 释义 |
Pressure flow
原声例句
工程学速成课 The service spillway had drains consisting of perforated pipes to relieve the pressure of water flowing beneath the slabs. 服务溢洪道设有由穿孔管组成的排水沟，以减轻板下方流过的水的压力。
英语百科
Pressure Flow Hypothesis（重定向自Pressure flow）
The Pressure Flow Hypothesis, also known as the Mass Flow Hypothesis, is the best-supported theory to explain the movement of sap through the phloem. It was proposed by Ernst Munch, a German plant physiologist in 1930. A high concentration of organic substances, particularly sugar, inside cells of the phloem at a source, such as a leaf, creates a diffusion gradient (osmotic gradient) that draws water into the cells from the adjacent xylem. This creates turgor pressure, also known as hydrostatic pressure, in the phloem. Movement of phloem sap occurs by bulk flow (mass flow) from sugar sources to sugar sinks. The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward). Because of this multi-directional flow, coupled with the fact that sap cannot move with ease between adjacent sieve-tubes, it is not unusual for sap in adjacent sieve-tubes to be flowing in opposite directions. |
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