产生变种

New variants of some plant viruses have been produced artificially in the laboratory by treating pure virus strains with mutagens.

用亚硝酸之类的诱变处理纯病毒株系，能在实验室内人为地使有些植物病毒产生新变种。

In an Asian clinical trial involving 1,206 adults in Hong Kong, Singapore, Taiwan and Thailand, the vaccine produced antibodies that not only neutralised the H5N1 virus found in Vietnam, but also the variant now dogging Indonesia.

在一项包括了香港、新加坡、台湾、泰国1206名成人的临床试验中，疫苗产生的抗体不仅可以消灭在越南发现的H5N1病毒，也对在印尼传播的变种有效。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。