An obstacle to progress
前进的障碍
🧩 词语组成解析
an
[æn]
art. 一（在元音字母前代替不定代词a）;一任一某一;一个;
to
[tu,tə]
prep. 向，朝着;到;关于;属于;
adv. 朝一个方向的;到某种状态;关闭;
progress
['prɑɡrɛs]
n. 进步;前进;[生物学]进化;（向更高方向）增长;
v. （使）进步，（使）进行;发展;促进;
vi. 发展;（向更高方向）增进;
pro向前，在前+gress走→向前走
🗣️ 情景例句
Blackjack.
二十一点！
I was on the track team 10 years ago.
十年前，我在田径队。
After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
比赛结束后，坎贝尔非常失望地得知他的平均时速是299英里。