Alca
n. (Alca)人名；(法)阿爾卡\\nabbr. 異常左冠狀動脈（anomalous left coronary artery）
??? 情景例句
It's 5:00 p.m. today.
今天下午5點整。
How big is your house?
你的房子有多大？
For instance, if you are older you have less time to recover from any major losses,
比如說，如果你年紀較大，你從重大投資損失中恢復過來的時間就較少，