New Words：
yawn [jɔ:n]
v.打哈欠
n.哈欠；无聊的人或事；无趣的想法
Sample Sentences：
He stood up, stretched and yawned.
His long boring story made me yawn.
She stretched her arms out and gave a great yawn.
The meeting was one big yawn from start to finish.
stretch [stretʃ] v.伸展；延伸；伸出；舒展
New Words：
crispy ['krispi] adj. 卷曲的；脆的；爽快的
Sample Sentences：
Deep fry them until crispy and lightly golden in colour.
It is a kind of fried food that tastes delicious and crispy.
When the marshmallow was toasted，the outside become brown and crispy.
New Words：
dessert [di'zə:t] n. 甜食；甜品；餐后甜点
Sample Sentences：
The restaurant provides free desserts for guests.
After dinner, She had homemade ice cream for dessert.
It was such a delicious dessert that I decided to order another portion.
New Words：
steam [sti:m]
n.蒸汽；水蒸气；水汽
v.蒸发；散发蒸汽；冒水汽；蒸（食物）
Sample Sentences：
The engines are driven by steam.
Steam has fogged the bathroom mirror.
The steam sang as it escaped from the pipe.
The hot tea steamed my glasses.
Steam is the only way my mom used for cooking crab.
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）