to add something extra for free; to include casually
免费添加某物; 随便地包括 (miǎn fèi tiānjiā mǒu wù; suíbiàn de bāokuò)
"The seller threw in a free cover with the phone."
"卖家 随便地 添加了一个免费的手机套。" (màijiā **suíbiàn de** tiānjiā le yīgè miǎn fèi de shǒujī tào.)
to maintain or keep something in its original condition for...
to resist unfair treatment or oppression
to reject an offer or opportunity
to take someone or something with you when you go somewhere
to develop confidence among team members
to switch from an old system to a new one