Mainstays
n. 支柱, 柱石（mainstay的复数形式）
🗣️ 情景例句
What are you going to do?
你打算读什么？
We have a small gift for you to take with you when you leave the factory.
你离开工厂时，我们有件小礼物要送给你。
The deepest known cave in the world is the Gouffre Berger near Grenoble.
世界上最深的洞穴是格里诺布尔附近的高弗。伯杰洞，