连绵起伏的山脉包括阿尔卑斯山脉横亘于法国和意大利之间，形成了一道天然国界；而侏罗山脉则延绵构成了法国和瑞士难以逾越的国界。
A series of massive mountain ranges includes the Alps, which separate France and Italy, and the Jura Mountains that delineate the Franco-Swiss border.
在山脚下看连绵起伏的山脉就像绿色的海洋。
In the mountains at the foot of the mountains look like an undulating green ocean.
连绵起伏的山脉包括阿尔卑斯山脉横亘于法国和意大利之间，形成了一道天然国界；而侏罗山脉则延绵构成了法国和瑞士难以逾越的国界。
A series of massive mountain ranges includes the Alps which separate France and Italy and the Jura mountains that delineate the franco-swiss border.
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