There are up to 50,000 symptomless carriers of the disease in the area.

A method for detection in lily symptomless virus ( LSV ) from lily bulbs was developed.

建立从百合种球幼芽中直接检测百合无症病毒 ( LSV ) 的体系.

Make sure you have your swimming cap on before you start the race.

比赛开始之前,一定先戴上泳帽.

You have to wear a swimming cap in most of the pools.

在大多数的游泳池里你都必须戴泳帽.

All Aquathon athletes must wear the swimming cap provided by the organizer in entering the water.

水陆二项的运动员必须佩戴本会供应泳帽进行比赛.

My little sister has a red swimming cap.

我小妹有一顶红色游泳帽.

The government has been storing radioactive waste at Fernald for 50 years.

政府在弗纳德存放放射性废料已达50年之久。

In practice it would be possible to measure radioactivity one thousand fold less than this.

在实际上,可能测定的放射性比这个值小一千倍.

The level of radioactivity in the soil was found to be above recommended limits.

土壤的辐射水平被发现超过规定的限度.

high levels of radioactivity

高强度的辐射

It is the product of radioactive decay ( see radioactivity ) and is used in helium dating.

氦 是由放射性衰变形成的,可用于氦年代测定法.

The ability of radiation to induce radioactivity in food is related to its energy.

辐照所引起的使食物具有放射性的能力是与辐照的能量有关的.

Radioactivity such as that of strontium 90 causes health problems in people even at low levels.

像银-90的放射性,哪怕是较低水平的放射性,都会对人体的健康造成危害.

People had no idea of radioactivity before Curie discovered radium.

直到居里夫人发现镭后,人们才了解放射性.

This, because of its age, has already lost most of its radioactivity.

这些铅因为年代久远, 已失去了它绝大部分的放射性.

Nevertheless, radioactivity remained a property exclusively associated with some thirty substances existing naturally.

然而, 放射性一直是大约三十种天然物质特有的性质.

METHODS: Using tissue culture and radioactivity analysis methods.

方法: 采用组织培养及放射免疫分析方法测定各指标.

It analyzes data processing method of radioactivity abnormity application effect of reservoir searching with radioactivity method.

总结了油气藏上方放射性异常的规律.

To produce ( radioactivity, for example ) artificially by bombardment of a substance with neutrons, gamma rays, and other particles.

感生通过用中子流 、 r射线线和其它一些粒子流射向一个物质而产生 ( 例如,放射现象 )

the discovery of radioactivity

放射现象的发现

I took the cigarette he offered, drawing at it raggedly.

我接过他给的烟, 在上面胡乱地画起来.