a sudden and significant progress
一次突然而重大的进步 (yi ci turan er zhongda de jinbu)
"This innovation represents a leap forward in technology."
"这一创新代表了技术上的一次飞跃。" (zhe yi chuangxin daibiaole jishu shang de yi ci feiyue)
To be proven innocent or free from blame.
feeling cheerful and happy
to return to the right path after a mistake or setback
the main story on the front of a magazine or newspaper
to reveal a secret accidentally
to buy something that is defective or worthless
