To mass-produce something is to make a very large number of the same object in a factory, with machines, so each one looks like the next and the price can stay low. Car makers mass-produce cars; phone companies mass-produce phones. The idea became famous in the early twentieth century, when factories learned to run a moving line and stamp out parts.

To mass-produce something mass-produce 一樣東西，is to就是 in a factory在工廠裡 with machines用機器 the same object把同一種物品 make a very large number of做出非常大量，so所以 each one每一件 looks like the next都跟下一件長得一樣，and the price而價格 can stay low也能保持低。Car makers汽車廠 mass-produce cars大量生產汽車；phone companies手機公司 mass-produce phones大量生產手機。The idea這個概念 in the early twentieth century在二十世紀初 became famous出了名，when那時 factories工廠 learned to學會 run a moving line開動生產線 and stamp out parts、沖壓出零件

Though actually this word is the action the factory does. The finished objects are mass-produced.

Though actually不過要注意 this word這個詞 is是 the factory工廠 does做 the action的那個動作。The finished objects做好的成品 are mass-produced是 mass-produced

People in business and news use the verb all the time. It is a little stiff for chat, but not rare. Handmade things are the opposite idea: each one is slightly different and usually costs more.

in business and news商業和新聞裡的 People人 all the time隨時 use the verb都在用這個動詞。It它 for chat拿來聊天 is a little stiff有點硬，but not rare但不少見。Handmade things手工做的東西 are是 the opposite idea相反的概念：each one每一件 is slightly different都有點不一樣，and usually costs more通常也比較貴