ragweeds

英式音标：

美式音标：

词义：

网络豕草类

英英释义

ragweed[ 'ræɡwi:d ]

n.

widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity

同义词：ragworttansy ragwortbenweedSenecio jacobaea

any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma

同义词：ambrosiabitterweed

用法：

权威例句

Ragweeds (Ambrosia L.) in Britain

Ragweeds (Ambrosia spp.): The Hay Fever Weeds

RAGWEEDS, AMBROSIA SPECIES, IN CANADA AND THEIR HISTORY IN POSTGLACIAL TIME

The North American ragweeds and their occurrence in other parts of the world.

THE MORPHOLOGY OF THE INFLORESCENCE OF RAGWEEDS (AMBROSIA〧RANSERIA : COMPOSITAE)

Ecological characteristics of the ragweeds and countemeasure of the biological weed control

FLOWERING BEHAVIOR AND NATURAL DISTRIBUTION OF THE EASTERN RAGWEEDS (AMBROSIA) AS AFFECTED BY LENGTH OF DAY

The Phytophagous Insect Faunas of the Ragweeds, Ambrosia chenopodiifolia, A. eriocentra , and A. ilicifolia , in Southern California

[Biological and clinical prevalence of pollinosis caused by ragweeds of the upper valley of the Rhone corridor]

Pollen-wall proteins: Localization of antigenic and allergenic proteins in the pollen grain walls of Ambrosia spp. (ragweeds)

造句：

1. Nowadays, a great deal can be done to alleviate back pain.

如今，减轻背部疼痛可以有许多方法。

来自柯林斯例句

2. Tranquillizers help alleviate the distressing symptoms of anxiety.

镇静剂有助于缓解焦虑所带来的不安症状。

来自柯林斯例句

3. A number of measures were taken to alleviate the problem.

采取了一系列措施缓解这个问题。

来自《权威词典》

4. The doctor gave her an injection to alleviate the pain.

医生给她注射以减轻疼痛.

来自《简明英汉词典》

5. Nothing could alleviate his distress.

什么都不能减轻他的痛苦.

来自《简明英汉词典》

[ alleviate 造句 ]