名詞 mainstay:

1. a prominent supporter
   同義詞：pillar
2. a central cohesive source of support and stability
   同義詞：anchor, keystone, backbone, linchpin, lynchpin
3. the forestay that braces the mainmast

1. He is the mainstay of our theatre group.
   他是我們劇組的臺柱。

main.stay

n.（名詞）
A chief support:
主要依靠：
例句：
Agriculture is a mainstay of the economy.
農(nóng)業(yè)是經(jīng)濟(jì)的支柱

Nautical A strong rope that serves to steady and support the mainmast of a sailing vessel.
【航?！?/i> 主桅支索：用來穩(wěn)定和支撐帆船主桅的結(jié)實(shí)的繩子