1 豆腐發明年代錯誤; Tofu was invented in South Song, which was documented in literature. Why is this an error? Where do you have the right record?
2 中國人外國人都是28顆牙加上四顆智齒; Chinese adults mostly have 28 teeth, four to 6 less than those in the nations who do not consume tofu.
3 日本也用石膏做豆腐，常常是石膏+鹽鹵. Japanese used to making tofu with gypsum, but since 70's they stop this techneque they learned from China. Instead, Japanese have used other gradients to make tofu.
4 豆腐中的鈣不能被人體吸收缺乏科學文獻支持和試驗證明. Tell me where is edivence that gypsium in tofu can be absorbed by human systems. The fact is that consumption of gypsum-bearing tofu causes loose of calcium from human systems thus results in the lack of calcium.
你的英文錯誤也有很多錯，還是寫中文吧; My English is adequate for communication and typing English is much fast than Chinese.
