Scales 称体重  
  
A lady noticed her husband standing on the bathroom scale, sucking in his stomach.
妻子看见丈夫站在卧室的秤上面，拼命吸气收腹。

Thinking he was trying to weigh less with this maneuver. she commented, "I don't think that's going to help."
妻子以为丈夫这样做是为了让体重看起来轻一些，就说：“我可不觉得你那样做会有什么用。”

"Sure it will." he said. "It's the only way I can see the numbers."
“当然有用了。”丈夫说：“只有这样我才能看见秤的仪表盘。

Notes:

scale 秤
sucking  往回吸，收腹
maneuver 巧计，策略