ad. 基本上, 主要地

base/basement/baseball/basic/basically/foundation/fundamental
记忆：
1. base [ beis ] n. 底部, 基础, 根据地, 基地 vt. 以. . . 作基础, 基于. . . The report was not based on facts at all. Every victim was very angry. 那份报告根本不是基于事实的，每位受害人都非常生气。
2. basement [ 5beismEnt] n. 地下室 The car is parked in the basement. 车子停在地下室。
3. baseball [ 5beisbC:l] A game played with a bat and ball by two opposing teams of nine players, each team playing alternately in the field and at bat, the players at bat having to run a course of four bases laid out in a diamond pattern in order to score. n. 棒球, 棒球运动
4. basic [ 5beisik ] adj. 基本的 Chinese is a basic course in the primary school. 语文是小学里的基本课程。
5. basically [5beIsIkElI] adv. 基本上, 主要地 Basically I agree with you.我基本上同意你的意见。
6. foundation [ faun5deiFEn ] The basis on which a thing stands, is founded, or is supported. n. 基础, 根本, 建立 Agriculture is the foundation of our national economy. 农业是我国国民经济的根本。
7. fundamental [ 7fQndE5mentl ] adj. 基础的, 基本的 We must study the fundamental factors that decide the result of the experiment. 我们必须研究决定实验结果的基本因素。
另类阅读：
Basically speaking, we should lay a good foundation/base in our study like building a house with a good basement.