v.勒缰绳使(马)停步( rein的过去式和过去分词 );驾驭;严格控制;加强管理;
例句:
He reined in to a jog.
他勒紧马缰绳使马缓步前进.
He reined his horse well.
他勒住了他的马.
He reined his horse back as he approached the busy road.
他走近拥挤的公路时勒住马.