Meaning of yī shí:
一时
a period of time
Wǒ zhǐshì ǒurán jiān kuàilè yī shí.
我只是偶然间快乐一时。
I was happy for just a moment.
a while
Tāmen shuō tāmen zhǐshì tíng xiàlái xiūxí yīshí.
他们说他们只是停下来休息一时。
They said they just stopped to rest for a while.
for a short while; at the same time
Tā zhǐ shì yī shí méi xiǎngdào.
他只是一时没想到。
He just didn't think of it for a short while.
Tā yī shí chōng dòng mǎi le zhè liàng chē.
他一时冲动买了这辆车。
He impulsively bought this car.
temporary; momentary
Tā de fènnù zhǐ shì yīshí de.
他的愤怒只是一时的。
His anger was only temporary.
Dàjiā zhǐshì yīshí gǎndòng, hěn kuài jiù wàngjì le.
大家只是一时感动,很快就忘记了。
Everyone was just momentarily moved, but soon forgot.