покручивать 动词 强调
Gruzovik	spin off and on; turn off and on; turn now and then; whirl off and on; twirl off and on; twist occasionally; wind now and then
一般	spin; twirl off and on; twist occasionally; wind now and then; whirl off and on; turn; spin on and off (рек. MichaelBurov); twirl on and off (рек. MichaelBurov); whirl on and off (рек. MichaelBurov)
покручиваться 动词
Gruzovik	revolve now and then; spin now and then; turn now and then
一般	revolve; spin; turn now and then