an unbroken span of concentration; The bridge crosses the river in a single span.
span v. 跨越/横跨; 延伸/贯穿: His interests spanned a wide range of
subjects. The game has a history spanning three centuries.故lifespan的直意为生命的跨度
4. metabolism n. the system of chemical activities by which a living thing gains power, esp. from food
新陈代谢: The metabolism is slowed down by extreme cold.
同源语汇
metabolic: People who have inherited a low metabolic rate will gain weight.
metabolize: Diabetics cannot metabolize glucose properly.
5. torpid a. having lost the power of feeling or moving; lazy or inactive; moving or thinking slowly 失去活动能力的; 处于蛰伏状态的: The heat and humidity made us feel torpid.
近义语汇
lethargic: The weather made her listless and lethargic.
sluggish: sluggish traffic; a sluggish economy
dormant: During the winter the seeds lie dormant in the soil.
latent: These children have a huge reserve of latent talent.
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