NASA has chosen to reschedule its Ingenuity Mars Helicopter's first experimental flight on the Red Planet to no earlier than April 14.

美国国家航空航天局（简称NASA）决定将其“机智号”火星直升机在火星上的首次实验飞行改为不早于4月14日。

In fact, I remember reporting on experimental flights more than a decade ago that were using biofuels made from plants, things like coconut husks and cooking oil.

事实上，我记得十多年前报道过使用植物制成的生物燃料的实验飞行，比如椰子壳和食用油。