Such parents vacillate between saying no and giving in — but neither response seems satisfactory to them.这类家长举棋不定,对孩子们的无理要求,不知道是该回绝还是该满足,觉得这两者都不理想.Without doubt , the national bourgeoisie tends to vacillate , but we shou...
They shut down the nuclear reactor for safety reasons.出于安全原因他们关闭了核反应堆。Emergency cooling systems could fail and a reactor meltdown could occur.紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。the core of a nuclear reactor核反应堆的活性区...