n.<口>重击，强击
v.用力打，狠揍( slug的现在分词 )，猛击（球）
the sluggish black waters of the canal
运河里缓慢流动的黑乎乎的河水
Circulation is much more sluggish in the feet than in the hands.
脚部的循环比手部的循环缓慢得多。
This humid heat makes you feel rather sluggish.
这种湿热的天气使人感到懒洋洋的.
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