Liesl says, " I'm supposed to be (that is what I am supposed to be doing), but I keep getting distracted." " To be distracted" means that you are not able to focus, you are not able to concentrate.
Liesl说, “我应该这样做(这是我应该做
),但我总是分心。 分心“意味着你无法集中注意力,你无法集中注意力。