extremities

四肢，骨端；末端，极限（extremity复数形式）；手足英释中释nThe extremity of something is its farthest end or edge

1 lower extremity,下肢

2 upper extremity,上肢

3 the last extremity,极大的危险(或不幸消息)

1 ...a small port on the north-western extremity of the Iberian peninsula.....一个位于伊比利亚半岛最西北端的小港口。

2 ...the extremities of the aeroplane.....飞机的两端。