大多数时候，板块之间的摩擦力使两者紧紧挤在一起，并随着时间增加，挤压力逐渐增加。
Most of the time, friction between the plates causes them to stick together, and stress increases over time.
但是随之逐渐增长的地面下的压力可以引起偶然性的大变动的爆发。
But the gradual build-up of underground pressure can lead to occasional bursts of cataclysmic activity.
对于中国来说，在美国保护主义压力与日渐增的时期，则希望得到美国的保证，不改变当前两国的现状。
China, for its part, wants reassurance that not much will change, at a time of rising protectionist pressure in America.
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