Each hyacinth flower has a little stalk of its own, by which it hangs from the main stem.
风信子的每一花朵都有一枝连接茎干的小花梗。
单词 | Main stem |
释义 |
Main stem
原声例句
英国学生科学读本 Each hyacinth flower has a little stalk of its own, by which it hangs from the main stem. 风信子的每一花朵都有一枝连接茎干的小花梗。 VOA常速英语_美洲 So we really want to perform that work when there are fewer species present in the main stem, and there is plenty of tributary access. 因此,我们计划在主流中的物种较少,支流通道中较多时进行这项工作。 湖底女人(上) We sifted along the main stem through the slacks and shorts and French sailor jerseys and knotted bandannas and knobby knees and scarlet lips. 我们沿着主干穿过休闲裤、短裤、法国水手球衣、打结的头巾、多节的膝盖和猩红色的嘴唇。 科学60秒-科学美国人 2021年11月合集 We're going to be listening to some far-reaching soundscape ecologies today from research that I've been conducting off of the main stem of the Amazon on the Peruvian border with Brazil. 今天我们将听到一些影响深远的音景生态研究我一直在秘鲁与巴西边境的亚马逊河主河道上进行的。
中文百科
干流![]() ![]() 在水文学中,干流是「河川下游内、对比于支流的主要河段」,即河流系统中最终最主要的河道,故又称为主要河道,或简称主河道。干流和所有支流水系以分水岭为界、所流动的范围,构成集水区,称为流域;而最终流域的水系将汇聚至干流。 依据水文学分类系统,单一流域内的。以史崔勒系统(修正自1945年罗伯特·霍顿所设计的系统)为例,「凡是没有任何支流注入的源流河川为一级河,当两条同等级河相会合后,河川等级数增加一级;若相会两河的等级不同,则会合后的河川等级数仍保持会合前的较高等级数。」在霍顿系统中,流域内的整个干流水体将具有最高等级数;然而,经1957年亚瑟·纽威尔·史崔勒修正后,仅有次高等级数的支流会合后所形成的干流部分河段,将具有最高的河川等级数。
英语百科
Main stem 干流![]() ![]() ![]() ![]() In hydrology, a main stem is "the primary downstream segment of a river, as contrasted to its tributaries". Another common term for the main stem, the final large channel of a riverine system, is the trunk. Water enters the main stem from the river's drainage basin, the land area through which the main stem and its tributaries flow. A drainage basin may also be referred to as a watershed or catchment. |
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