一个可能性是幼虫之间互食行为的倾向。
One possibility is the tendency of young locusts to eat one another.
结论家庭、学校和社会对儿童的零食行为影响很大。
Conclusion Family, school and society have great impact on the snack behavior of children.
她之后坐下吃免费餐食的行为则让我困惑。
上课的时候吃零食、喝饮料或者嚼口香糖，这在美国被认为是不礼貌的行为。
It is considered impolite in the U.S. to eat, drink or chew gum during class.
上课的时候吃零食、喝饮料或者嚼口香糖，这在美国被认为是不礼貌的行为。
It is considered impolite in the U.S. to eat, drink or chew gum during class.
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