tā / tí / bǐ / xiě / zhè / fēng / xìn / de / shí / hòu / ， / shǒu / yì / zhí / zài / wēi / wēi / chàn / dǒu / 。

他提笔写这封信的时候，手一直在微微颤抖。

When he took up his pen to write this letter, his hand was trembling slightly.