它还关注所谓的“近距离接触”，即两只手靠近方向盘顶部，这样司机就可以一边开车一边用两个拇指打字。
It also watches for what's called "close by hands", where both hands are close together near the top of the wheel, so the driver can type with both thumbs and drive at the same time.
带有个手指和两个拇指的哨笛。
带有四个手指孔和两个拇指孔的。
A small fipple flute with with four finger holes and two thumb holes .
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