to have a very good and friendly relationship
拥有非常好的友好关系
"The two sisters get on like a house on fire."
"这两个姐妹关系很好。"
to start something that causes many unforeseen problems
to relax after a period of hard work
to remember pleasant events from the past
to operate smoothly and efficiently
to not tell others what someone has told you in confidence
to think or act creatively and unconventionally