You can use any Ruby gem or Rails plug-in you want with your application.
在应用程序中可以使用任何Rubygem或Rails插件。
This is a kind of gem material with high refractive index.
这是一种具有高折射率的宝石材料。
This piece of gem was incised with his name and used as his seal.
这块玉上刻着他的名字，并被用作他的印章。
He said he was very pleased with the price that the gem had fetched.
他说，这颗钻石拍出的价格让他非常高兴。(编辑：赵露)。
He said he was very pleased with the price that the gem had fetched.
他说，这颗钻石拍出的价格让他非常高兴。(编辑：赵露)。
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