What is a "bear hug"?

give sb a bear hug What I need,just is a hug a big bear hug 中的bear怎么理解 a bear ,will,do,what,if,in danger,it is what colour is the bear? COOPERS BIG BEAR HUG怎么样 He is a bear 英语翻译What is a koala?Koala is a small bear-like animal.It is Hug the bear,hug the happiness 什么意思 This one is a bear. This is a brown bear. what is the difference between a pear and a bear?什麼的意思