1. mainstay

1. 主桅前支索：mainstationpeg 主测站标桩 | mainstay 主桅前支索 | mainstay 主要支持 主支索 大桅牵条

2. 中流砥柱：mainspring 主发条 | mainstay 中流砥柱 | mainstayanconbracingpuncheonshoringstanchionunderpinning 支柱

3. mainstay的近义词

3. 支柱,主体：chronic diseases慢性病 | mainstay 支柱,主体 | public health policies公共健康政策

1. 支柱;中坚
    If you describe something as the mainstay of a particular thing, you mean that it is the most basic part of it.

    e.g. Fish and rice were the mainstays of the country''s diet...
           鱼和米是该国的主要食品。
    e.g. This principle of collective bargaining has been a mainstay in labor relations in this country.
           这一集体谈判原则已经成为该国劳动关系的重要基础。

1. the forestay that braces the mainmast

2. a central cohesive source of support and stability

    e.g. faith is his anchor
           the keystone of campaign reform was the ban on soft money
           he is the linchpin of this firm

    Synonym: anchorkeystonebackbonelinchpinlynchpin

3. a prominent supporter

    e.g. he is a pillar of the community

    Synonym: pillar