Carbon chain
[建] 碳鏈
?? 詞語組成解析
carbon
['kɑrb?n]
n. [化學(xué)]碳;（一張）復(fù)寫紙;[電]碳精棒[片，粉]，碳精電極;復(fù)寫的副本;
adj. 碳的;碳處理的;
carbo-, carb- 表示與煤炭相關(guān)
chain
[t?en]
n. 鏈子，鏈條;連鎖，連續(xù);拘束;連鎖店或旅館系列的事物;
vt. 用鐵鏈鎖住;監(jiān)禁，束縛;
??? 情景例句
How come you look so tired?
你怎么看起來這么疲倦？
I broke my leg.
我摔斷了腿骨。
becomes so worn and unreliable that it eventually is not worth mending.
磨損太厲害，老得一點(diǎn)兒也不準(zhǔn)了，最終會不值得修理了。