这条线断了。
MathML 3 specifies a line breaking model and introduces several new attributes to control the properties of the line breaks and the way in which the lines are aligned.
MathML 3指定一个换行模型并引入几个新属性,来控制换行的属性以及行对齐的方式。
Breaking down food, absorbing nutrients, and expelling of waste requires chemical processing, mechanical mixing and rhythmic muscle contractions that move everything on down the line.
分解食物、吸收营养,排出废物,则需化学反应,机械搅拌,肌肉韵动三方协作。
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