I have no impression how he came back, perhaps by bike.

我记不得他是怎样回来的， 也许是骑自行车回来的。

youdao

I want to begin by talking about impression formation, how we form impressions of others, and tell you a couple of interesting things about impression formation.

我想先开始讲印象形成，我们如何形成对他人的第一印象，再跟大家讲几件,关于印象形成的有趣特点。

耶鲁公开课 - 心理学导论课程节选

These are good at gleaning trends in factories and offices, but they give only a murky impression of how Americans use the rest of their time.

ECONOMIST: Why Americans have plenty of time to read this

If they seem more important than that, it may just be because the size of the Yankee payroll and the notoriety of the players it pays for can give a seriously misleading impression of how the team is structured.

WSJ: The Yanks Aren't in Trouble��Yet

Five of the judges give marks for artistic impression which includes how far the performer travels in the pool and choreography.

BBC: Canada on course for glory