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1.Equatorial adj/n. 赤道的
例句：In the equatorial upwelling zone, there is very little seasonal change in phytoplankton productivity.
在赤道上升流区，浮游植物的生产力很少有季节性变化。
2.unguarded adj.无防备的
例句：His whole bearing had the appearance of an effort to keep clear of the imperfections which, through unguarded avenues, find entrance into earth, water and air, and into the ways of men.
他的整个行为举止都显示出这样的一种努力：清除一切因通过没有设防的道路而到达大地、水、空气和人身上的瑕疵。
3.vaccination n.接种疫苗
例句：And that is not the only problem with this method of vaccination.
而这并不是使用这种疫苗接种方法的唯一问题。
4.maggot n.蛆
例句：They actually start out as eggs, but at least he corrects Democritus's misguided direction of maggot origins.
其实，幼虫一开始是卵，但他至少纠正了德谟克利特的蜜蜂始于蛆的误导。
