Endurance cracks may appear in the hull structure at different ship-ages for some ships, especially at the vesselbottom and the longitudinal bone on board side.
有些船舶在不同的船龄阶段，在船体结构上出现疲劳裂纹，特别是在船底、舷侧纵骨中较为突出。
2
If the temperature is high enough, the core slumps to the bottom of the reactor vessel and melts through it and onto the floor of the containment unit.
如果温度高到一定程度，堆心就会落到反应堆容器的底部并将其熔穿，从而到达密封装置的底部。
3
Some of the salt might be settling to the bottom of the reactor vessel rather than sticking to the fuel rods.