周末复习

词：hitch

英英释义：an unexpected difficulty, obstacle, delay, etc.

词：antidote

英英释义：something that helps to improve the effects of something bad or negative

词：cornerstone

英英释义：the basic part of something, on which everything depends

词：ground

英英释义：a reason for what you say or do, or for being allowed to say or do something

词：springboard

英英释义：something that helps you to become successful