4周搞定2000+托福核心词
circle = circ(圆，环) + le(反复) = 圆环反复→循环周期
circuit = circu(圆，环) + it(行走) = 电路，回路
生理节奏的
circadian
常考释义
Such a rhythm whose period is approximately—but not exactly—a day is called circadian.
这种和一天的循环周期很接近但不完全同步的循环叫做生理节奏。
来源于：阅读OFFICIAL13 P2adj. 昼夜节律的；24小时生理节奏的【生】
"Our circadian rhythm wants us to sleep at night," she said.
我们的生理节律要求我们在晚上睡觉,"她说。
Such a rhythm whose period is approximately—but not exactly—a day is called circadian.
这种和一天的循环周期很接近但不完全同步的循环叫做生理节奏。
来源于：阅读OFFICIAL13 P2north-easterly adj.在东北的；向东北的；朝东北的
north北+easterly东方的 = 在东北的；向东北的
lithium n.锂
lith石头+ium金属元素 = 锂
stimulus n. 刺激
stimul刺激+us表名词 = 刺激物
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