周四早晨，日本自卫队开始从直升机上对3号反应堆进行4次注水，他们计划在周四的某个时间对4号反应堆采取同样的措施。
On Thursday morning, Japan's Self-Defense Forces started dumping water from a helicopter on reactor No. 3, making four passes. They planned to do the same for No. 4 sometime Thursday.
第一警卫队的直升机被调用来向反应堆进行空中注水，但由于担心核辐射剂量过高，一小时后便不得不放弃注水。
First military helicopters were deployed to dump water on the site from the air, although fears over radiation levels meant they had to give up after about an hour.
但是，近来试图通过向反应堆容器注水来降温的努力似乎遇到了困难。
Recent attempts to keep the reactor cool by filling the containment chamber with water have run into difficulty.
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