New Words：

marsh [mɑ:ʃ] n. 湿地；沼泽地
marshmallow ['mɑ:ʃmæləu] n. 棉花软糖

Sample Sentences：

It's dangerous to be alone in the marsh.
The marsh was steaming in the strong sun.
He told them that they could eat the marshmallow at once, or wait until he came back and get two marshmallows.

steam [sti:m]
n.蒸汽；水蒸气；水汽
v.蒸发；散发蒸汽；冒水汽；蒸（食物）

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