Chain substitution
[化] 鏈上取代
?? 詞語組成解析
chain
[t?en]
n. 鏈子，鏈條;連鎖，連續;拘束;連鎖店或旅館系列的事物;
vt. 用鐵鏈鎖住;監禁，束縛;
substitution
[?s?bsti'tju:??n]
n. 代替;代用;替換;<化>取代（作用）;
??? 情景例句
During our stay in London, we visited Buckingham Place.
我們在倫敦逗留期間參觀了白金漢宮。
He speaks Chinese every day.
他每天都講漢語。
They stopped talking when their boss came in.
當老板進來的時候；他們停止了交談。