There's no need to be so unfriendly towards them.

　　沒(méi)必要對他們這么不客氣。

　　She has a very formal manner, which can seem unfriendly.

　　她的舉止很是鄭重其事，有可能會(huì )顯得不友好。

　　His tone was curt and unfriendly.

　　他說(shuō)話(huà)的語(yǔ)調粗暴無(wú)禮。

　　Use more eco-friendly materials, and less of it.

　　使用更加環(huán)保的材料，并盡量少用。

　　Study on Preparation and Properties of Eco-friendly Functional Cotton Fiber with Selective Oxidation

　　選擇性氧化法制備環(huán)境友好型功能棉纖維研究

　　Environmental protection and development of the eco-friendly fabric softening agent

　　環(huán)境保護和環(huán)保型織物柔軟劑的發(fā)展探討