They start producing little, miniature sentences like "Want cookie" Or "Milk spill" and the function morphemes, the little words, "In," "Of," "A," "The," and so on start to gradually appear.

他们开始创造出短小的句子,比如"要饼干"或"奶洒了",而诸如"在内","属于","一个","这个"等短词的功能语素,也开始逐渐出现

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Protein-rich foods are harder to digest. So skip the high-protein snack before bedtime and opt for a glass of warm milk or some sleep-friendly carbs, like crackers.

富含蛋白质的食物难以消化，所以睡前应戒除高蛋白质小吃，而选择一杯温牛奶或像饼干这样一些有助睡眠的睡前碳水化合物食品。

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The purity of minerals is often assessed in this way, as are things like the amount of fat in milk or salt in water.

估定矿物质的纯度就常常用这种办法。

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