1 [U] the ability to be very active or do a lot of work without getting tired 活力;精力:
Children are usually full of energy.小孩子通常精力充沛。
2 [U] the power that comes from coal, electricity, gas, etc that is used for producing heat, driving machines, etc 能量;能源:
nuclear energy核能an energy crisis能源危机
3energies [pl] the effort and attention that you give to doing sth (放在工作上的)精力:
She devoted all her energies to helping the blind.她尽心尽力帮助盲人。
4 [U] (technical术语) the ability of a substance or system to produce movement 力量:
kinetic/potential energy动力;潜力