查询词典 marsh fern

Any of various slender, narrow-winged hawk s of the genus Circus, such as the marsh hawk , that prey on small animals.

各种瘦长窄翅膀的、以捕食小动物为生的鹞属鹰类中的任何一种，例如丛林鹰

A juvenile marsh harrier showing a pale breast band (extending round towards the mantle), pale on the rump, extensive pale on the upperwing coverts, an extensive blaze on the underside of the primaries, and/or traces of barring can be safely identified as an EMH .

依据以下几点才能被鉴定为白腹鹞：拥有浅色胸带的鹞属猛禽幼鸟；浅色腰部；翼上的大片浅色区域；初级飞羽下面的大片白斑，具有横斑。

Tall annual marsh elder common in moist rich soil is central North America that can cause ''.

一种一年生的、高大的沼生接骨木，它常见于北美中部的潮湿沃土上，造成''。

Tall annual marsh elder common in moist rich soil is central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever .

一种一年生的、高大的沼生接骨木，它常见于北美中部的潮湿沃土上，造成接触性皮炎；产生许多花粉，是引起花粉热的主要原因。

Mangrove forests replace saltmarsh in tropical regions and support a rich fauna.Salt marsh, mudflats and mangroves

红树林在热带区域取代了盐水沼泽，并且支持了丰富的动物区系。

Wetland Low lying areas with hydrophilic vegetation and subject to seasonal or permanent water-logging or flooding, such as marsh, fen, peatland, bog, flood plain, mudflats or a delta

shi di 湿地长有亲水植物并季节性或永久性被水淹没的低洼地带，例如：沼泽地、泥炭地、洪泛区、泥滩或三角洲。

The flux rate of methane emission from the peatland in Qinghai-Tibet highland and the freshwater marsh in Sanjiang plain ranged from 0.16 to 10.0 mg CH4 m-2 h-1 with an average of 2.96 mg CH4 m-2 h-1 and 0.16-54.6 mg CH4 m-2 h-1 with an average of 19.6 mg CH4 m-2 h-1, respectively.

依据本研究野外实际测定的甲烷排放通量和前人已有的研究结果，初步估算了我国沼泽湿地甲烷年排放总量为1.76Tg ，占全球沼泽湿地甲烷排放总量68Tg 的2.59%。

But I'd as soon offer to take hold of a blue ignis fatuus light in a marsh.

要是我有胆量，我会碰碰你，看你是实实在在的人，还是一个影子。

A luminosity that appears over swamps or marsh es at night;ignis fatuus.

鬼火，磷火夜间在旷野或沼泽出现的闪光；鬼火

The heavy hydrocarbons of coal-derived gas associated with fresh lacustrine and marsh have relatively hydrogen light isotope but those related with marine environments have relatively heavy hydrogen isotope.

淡水湖沼相烃源岩生成的煤成气相对富集氢同位素氕，而海相烃源岩生成的煤成气则相对富集氢同位素氘。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。