主要的义务规则是那些要求或禁止某些行为的规则。
Probable reason, I know not how it is, but I have observed it.
词语就像钥匙,选对了就能打开任何一扇门。
在水产养殖中,耐心不仅是美德,更是必需品。
"The key to great filmmaking is to capture the truth of the human experience."
Success is not about the destination, but the journey.