Now Tom was motioning with his hand out, palmdown flat, making a small circular motion in mid-air.
汤姆伸出手来,手心平着向下,在空中划了个小圈。
2
Scientists had volunteers place one hand, palmdown, under a board.And they asked the subjects to guess, by pointing to the board with their other hand, where their hidden knuckles and fingertips lay.