例句：Our kids are playing football.
我们的小孩们在踢足球。
kidney n. 肾
例句：A primary function of the kidney is to remove unwanted substances from the blood
肾脏的主要作用是把废物从血液中排除掉。
kit n. 成套工具，用具包
例句：The nurse has taken a first-aid kit.
护士已经带上了一套急救用品。
knit v. 纺织，密接
例句：I gave him a knitted shawl as a Christmas gift.
我送给他一条编织的披肩作圣诞礼物。
knob n. 节，旋钮
例句：You may turn the right knob on the TV to switch it on.
你可以拧电视上右边的旋钮把它打开。
