A what do you think?
B i'm not sure. how does it work?
A when someone comes to the door, they pull this string.
B so this is a pivot?
A yes, and these are pulleys.
B but is there a problem here? does the
hammer move clockwise?
A oh, you're right. it rotates the wrong way.
B the bell needs moving over to the other side.
A the direction of the hammer head is wrong too. it needs reversing.
B do we need to put something under it, to stop it falling too far?
A yes, and perhaps it needs a spring to pull it back.
A你怎麼想?
B我不太肯定。它是如何運作的?
A當一個人到 了門口,他們把這個串起來。
B所以這是一個支點嗎?
A是的,這些都是滑輪。
B但這是不是有一個問題?錘移動順時針方向?
A哦,你是對的。它旋轉時走錯了路。
B鐘需要移動到另一邊。
A的鎚頭的方向是錯誤的。它需要扭轉。
B我們需要把東西下,停止落下太遠?
A是的,也許它需要一個彈簧,把它拉回來。