Every noble work id at first impossible.

每项伟大的事业，开始时都是不可能的。

youdao

The vehicle is helping scientists to see for the first time huge areas underneath the lake that were otherwise impossible to explore.

VOA: special.2009.06.03

It is impossible to say how first the idea entered my brain.

VOA: special.2009.05.16

Actual modernization,says Nemtsov, is impossible without naming and removing the people responsible for the stagnation and authoritarian rule in the first place.

VOA: standard.2009.11.12

Let's start with the hardest problems, those challenges that at first blush seem impossible.

WSJ: Jonah Lehrer on How to Be Creative

Basic physics dictates that the first method is impossible without the use of heavy pharmaceutical aids, which is not encouraged.

FORBES: The How-To-Do Anything Guide

Because the first is virtually impossible in the short- to medium-term and unlikely in the longer term, immigration would appear to be the solution of choice.

CENTERFORSECURITYPOLICY: Farewell to Europe