Udcs
abbr. Universal Decimal Classfication (图书、资料等的)国际十进分类法
🗣️ 情景例句
John Marchetta runs this company. John Marchetta
经营这家公司。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
Though the sound could be heard clearly, it took me a long time to react.
虽然声音听得很清楚，但我过了好一会儿才作出反应。