spar

n. 超精密进场雷达

A small or light spar.

帆柱一根小的或轻的桅杆

A tall vertical spar, sometimes sectioned, that rises from the keel or deck of a sailing vessel to support the sails and running rigging.

船桅，桅杆一条高的（有时为分段的）垂直樯，从帆船的龙骨或甲板直立起来以支持帆和操纵装置