1.estimate to 估计
We estimate the cost to be five thousand dollars.
我们估计费用为5000美元.
It enables an estimate to be made of the reserves , including sphalerite.
它可以用来估计包括闪锌矿在内的储量.
2.ask to 要求
Ask to speak to the sister on the ward.
请求和病房里的护士长说话 。
"I didn't ask to be born!" she bellowed.
“我没有要求你们把我生下来!”她吼道 。