He presented Albert with a rat, and every time the baby reached out to touch it, Watson hit a steelbar with a hammer to produce a horrendous clang.
他给艾伯特一只小鼠，每当小艾试图触摸它时，沃森都会用锤子敲击一根铁棒以发出一种可怕的声响。
2
Then he fastened a small metallic ball on each end of the steelbar.
然后，在细钢棍的两端，各固定一个小的金属球。
3
On the point of an upright needle he laid horizontally a fine steelbar, which could turn to the right and left like the magnetic needle in a compass-box..