adjustable fixture

例句：

1. 1. Theadjustable seat allows for easy adjustment of theheight.
   可调节的座椅允许轻松调整高度。
2. 2. The adjustable desk can be used forboth writing and studying.
   可调节的书桌既可以用于写作也可以用于学习。
3. 3. The adjustablestraps on this jacket make it comfortableto wear.
   这件夹克上的可调节带子使其穿着舒适。