尼日尔是世界第五大铀生产国，但至今还没有建设出一个反应堆，因为光建造费用就超过其GDP的一半。
Niger may be the world's fifth-largest uranium producer, but the cost of building a reactor to make use of it would take up more than half the country's GDP.
其原因也许在于童年时期感染幽门螺旋杆菌能让免疫系统学会适当地反击外源抗原，这样长大后就不会因为反应过激而出现哮喘。
It could be that encountering Helicobacter as a kid teaches the immune system how to react, and not overreact as in asthma to future allergens.
他们认为，形成这种局面不是因为AECL未能按其承诺建造反应堆，而是核管理机构要求AECL应该信守承诺。
The stalemate, they argue, is not due to AECL's failure to deliver the reactor that it promised, but rather the nuclear regulator's demand that AECL should be held to that promise.
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