查询词典 weeds

She looked about fifty years of age, and was dressed in rusty widow's weeds.

她看上去大约五十岁光景，穿着寡妇穿的铁锈色丧服。

Some of them fled one way and some another; and one of them was, they said, dressed up in widow's weeds.

有的往这条路跑，有的往那条路跑；他们说里面有一个是穿着寡妇的丧服。

Witchweed is among the few flowering weeds that act as parasites on other plants.

独角金在野草中扮演着寄生虫的角色寄生在其他的植物上。

Witchweed is very difficult to remove after it in weeds and area.

在独脚金入侵领域后，独脚金非常难以移走。

The weeds community in the dry direct seeding paddy field is compound made of both water plants and xeromorph plants which have two fastigiums.

水稻旱直播栽培是近几十年发展形成的一种轻型水稻种植方式，具有省工、投资少、节水抗灾能力强[1，2]等优点。

The weeds and tall grass in that yard make the house look as if it ___ vacant for quite some time.

本题考查as if引出的虚拟结构，句意为：那个院子里面的杂草和长得很高的草使那个房子看起来好像很长一段时间没有人住了。

Alfreda Murck,"Paintings of Stem Lettuce, Cabbage, and Weeds: Allusions to Tu Fu's Garden", Archives of Asian Art

亚洲艺术档案 48 (1995)， 32-47。中译：姜斐德《以莴苣、白菜和野草为画——杜甫菜园的隐喻》《清华美术》， 2005-12。

When single herbicide was used in the field for two years, the dominant species took place corresponding alternation. The community structure that originally mostly consisted of dicotyledonous weeds , such as Alopecurus aequalis sobol., etc.

通过连续几年的单一除草剂使用，烟田杂草的优势种群发生了相应变化，原来以看麦娘、马唐、稗草等单子叶杂草为主的群落结构演变成了现在以稗草、马唐及胜红蓟、两栖蓼、茴茴蒜为主的单、双子叶杂草混生结构，说明烟田施用除草剂会引起杂草群落结构变化，因此，在生产上则应注意除草剂的轮换使用。

Twenty three troublesome weeds and five crops were tested to study specificity of helminthosporin. The result showed that 18 out of the 28 species were susceptible to the toxin. Chenopodium serotinum is the most susceptive, and D. sanguinalis, Polygonum aviculare, Beckmannia syzigachna, Chenopodium album and Alopecurus japonicus took second place.

该毒素在150μg/mL浓度下，对马唐胚根生长抑制率达44.59%；当毒素浓度达到200μg/mL时，叶绿素含量下降18.41%；在500μg/mL浓度下，毒素对供试的23种杂草产生的毒害程度不同，其中小藜对毒素最为敏感，其次为马唐、萹蓄、菵草、藜和日本看麦娘等恶性杂草。

As machine vision owns many merits, 3CCD multi-spectral camera was used to capture pictures of soybean and two common weeds(Alternanthera philoxeroides and Eleusine indica).

通过对多光谱成像仪获得的数字图片，采用一定的目标分割与形态学处理，对豆苗和杂草进行识别判断。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。