（姑且认定） suppose; assume; grant; presume; fiction; let; on the supposition (of); on the supposition that
Suppose A equals B.
假定 A等于B。
Let us suppose another planet with conditions similar to those on the earth.
让我们假定另外有一个具有和地球上相似条件的行星。
Assuming this to be true ...
假定这是真的 ...。
You assume his innocence before hearing the evidence against him.
在未听到对他不利的证言之前， 你假定他是无罪的。
（科学上的假设， 从前也叫假定） hypothesis
The new discoveries have falsified that hypothesis.
新的发现已证明那个假定是无根据的。
[数] assumption; postulation; presumption