1、I would unhesitatingly choose the latter option.
我會(huì)毫不猶豫地選第二個(gè)選項(xiàng)。

2、Realizing there was nothing for him to do to save his plane, the pilot unhesitatingly baled out.
飛行員意識(shí)到自己已無(wú)力挽救飛機(jī)，便毫不猶豫地跳了傘。

3、Upon seeing a kid falling into the lake, he unhesitatingly plunged in with his clothes on.
看見(jiàn)一個(gè)小孩兒掉進(jìn)湖里，他連衣服都沒(méi)脫就毫不猶豫地扎了進(jìn)去。