但是我做这些未发酵面包，不用发酵剂，在木头做燃料的烤箱里，从开始到结束用不了犹太教规定的18分钟。

But I make this matzo without leaven in my wood-burning oven under the prescribed 18 minutes from start to finish.

youdao

燃料持续燃烧三分钟后第一级被抛弃。

That burns for three minutes, before being jettisoned.

youdao

但每节约一分钟的飞行时间，可以减少大约60升的燃料消耗和削减160公斤的二氧化碳排放量，所以，努力还是值得的。

But every minute of flying time saved can reduce fuel consumption by some 60 litres and cut 160kg of CO2 emissions, so the effort is well worthwhile.

youdao