基础

lay the foundations/base/understructure of a house

build a firm/sound foundation

We'll try to improve on what has been achieved.

Both sides agreed to cooperate on the basis of equality, mutual benefit and exchange of needed goods.

Hard work is the cornerstone/foundation of success.

Agriculture is the foundation of the national economy.

The Five Principles of Peaceful Coexistence are the basis for the establishment of international relations.

foundation in reality

power/material base

theoretical/social basis

firm/solid/sound foundation

base tariff level

basic curriculum

basic teaching material

have a mass basis

provide a good foundation/base/basis (for)

shake/solidify/undermine the foundations

form a base; lay the foundations; prepare/provide the groundwork

lay a solid foundation; establish a solid/firm/sound basis