基本解释：贝蒂群
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In chapter 2 we use harmonic 1-forms and discuss the relationship between an almost nonnegatively Ricci curved n-manifold with the first Betti number equal to n and a flat n-torus.在第二章中我们利用调和1-形式研究了第一贝蒂数等于n且Ricci曲率几乎非负的n维黎曼流形和n维平坦环面之间的关系。
Wake up, Betty. Wake up, Betty.贝蒂，醒来了。贝蒂，醒来了。
Betty, er, what do you call her, darling Betty?贝蒂，呃，你叫她什么，宝贝贝蒂?
Jane: That's a good idea, Betty.简: 好主意, 贝蒂。
What's your opinion, Betty?贝蒂，你的看法呢？
Daming! Betty! Over here!大明！贝蒂！这里！
Betty, Betty White. I'm glad to meet you.贝蒂。贝蒂?怀特。很高兴见到你！
Betty： Hello. Sales Department. This is Betty Fields speaking.贝蒂：喂，业务部，我是贝蒂_尔兹。
Betty sells shells on the back of a red shell.贝蒂在红色贝壳的背面上卖贝壳。
Betty, John and Harry came to see him,贝蒂、约翰、亨利都来看他，
She spoke her mind to Betty.她向贝蒂吐露了心声。
Betty is a sedate girl.贝蒂是个恬静的姑娘。
Betty, why are you stopping?贝蒂，你怎么停下了？
Betty was very happy to get the gift.贝蒂非常高兴收到礼物，
You are a good student, Betty.贝蒂，你是个好学生。
Her parents, David and Betty.她父母、大卫和贝蒂。
Does Betty like that programme?贝蒂喜欢那个节目吗？
Betty was happy to hear that.贝蒂听到这非常高兴，
Betty received many gifts.贝蒂收到了很多礼物。
