But if you hit one against another, only one is cracked:)

所有跟帖： 

• If this topic is picked up at home,某人會說“不跟你這個文科生討論此類問題”：） -暖冬cool夏- ♀ (0 bytes) () 06/08/2024 postreply 21:07:26

• I can see now:all spots on an egg cannot bear the same force -7grizzly- ♂ (0 bytes) () 06/09/2024 postreply 08:23:56