steer
vt.驾驶，为…操舵;引导 vi.驾驶
He was steering with only one hand.他只用一只手驾驶。
stem
n.茎，干;词干 vi.(from)起源于 vt.堵住
long-stemmed wine glasses高脚酒杯
step
n.(脚)步;步骤;台阶 vi.行走;踏上
a video of baby’s first steps一盒婴儿学步的录像带
stern
a.严厉的，严格的，严峻的 n.船尾
sterner penalties for drug offences对毒品犯罪的更为严厉的惩罚
