For one, the petroleum-fueled internal-combustion engine (ICE), as highly refined, reliable and economical as it is, is finally reaching its limits.
For one, the petroleum-fueled internal-combustion engine (ICE), as highly refined, reliable and economical as it is, is finally reaching its limits.
首先，以石油为燃料的内燃机虽已相当进步、经济、可靠，但也终于达到了极限。