張三每年都要得感冒+流感幾次;
李四極少得感冒。
你說,張三和李四,誰的免疫係統更強大?
注意一點,李四同樣會受到感冒病毒入侵,但他的免疫係統禦敵於國門之外。
• 簡明扼要,好!推薦Chris Kyle的"American Sniper",希望它能得今年的奧斯卡最佳影片獎. -閩姑- ♀ (103 bytes) () 01/19/2015 postreply 20:01:11
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