short thumb造句

• The squirrel has a very short thumb that it uses to hold and control its food while feeding.
• "Chimpanzees are knuckle walkers and have relatively long fingers and short thumbs, so the thumb isn't readily opposable as it is in humans,"
• This is where I discover that I have short thumbs _ too short to operate the throttle _ and a thumb extender is needed.
• While it is fairly easy to cross the long 3rd finger over the short thumb, acrobatic dexterity is required to cross the 3rd finger over the 4th one.