这些障碍物对于想要往上游游动的鱼儿来说是致命的。The barriers are lethal to fish trying to swim upstream.很难判断是谁给了致命的一击。It is impossible to say who struck the fatal blow.医疗当局对其病因及有多致命都还不甚了解。Medical authorities were baffled, both as to its causes ...
Next, anesthetize the female by placing her in the same dedicated anesthetic container.然后用同样的方法把母鱼放进同样的麻醉池中,过程已经在上面讲的很详细了.You would hae to anesthetize them to take blood samples.你需要麻醉它们取血样.to anesthetize with cocaine.用可卡...
The first British attempt to colonize Ireland was in the twelfth century.英国最早尝试在爱尔兰开拓殖民地是在12世纪。She is entitled to a twelfth of the cash.她有权获得这笔钱的1/12。December is the twelfth month of the year.12月是一年中的第12个月....