当美国宣布辐射水平已经非常高的时候，情况更糟了，美方要求日方尽力控制局面。
Matters worsened when America announced that it thought radiation levels were extremely high, and could severely constrain efforts to control the situation.
英国，法国和德国已经提高了本国境内的安全预警，但是无论如何，现在他们的警惕性都已经非常高。
Britain, France and Germany have raised their own security alerts within their borders, but then they are quite elevated anyway.
头能够被替换，但是挑战，和这个额外的花费已经做这些检查的，费用是非常高的。
Heads can be replaced but the challenge and the additional cost and expense of doing these inspections is very very great.
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