北部是人口较多的地方，地势比较开阔，但仍然会有不少山峦起伏。 例如，汝拉（Jura ）山-瑞士东北的一座相对较小的山脉。
The northern, more populous part of the country is more open, but can still be mountainous, for example, in the Jura Mountains, a smaller range in the northwest.
结果表明：起伏对强制循环下一回路冷却剂的流量和反应堆输出功率的影响较小，而对自然循环能力的影响很大。
The results show that heaving has less effect upon the primary Loop's coolant flow rate and PWR output power in case of forced circulation but strongly influences natural circulation ability.
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