A significant advancement or achievement.
一个重要的进步或成就。 (yi ge zhong yao de jin bu huo cheng jiu)
"Landing on the moon was a giant leap for mankind."
"登月是人类的一大飞跃。" (deng yue shi ren lei de yi da fei yue)
to miss an opportunity
time when one relaxes and does not work
a small indication of what the future might be like
to achieve great success
a part of the complete solution or understanding
to be the first to do something or lead the way
