The children wore special wrist-band devices for a week to track the amount they slept.
为了跟踪孩子们的睡眠时间，他们戴了一个星期的特殊的手链装置。
A band, as on a long sleeve or a wristwatch, that encircles the wrist.
袖口边，护腕围绕手腕的带子，如长袖子或手表。
Bracelet: an ornamental band or chain encircling the wrist or arm.
手镯：环绕手腕或手臂的装饰带或装饰环。
Reverse Wrist Curls: In a seated position, wrap the band twice around the feet.
反向屈腕：找个地方坐下，将拉力绳在双脚缠绕两圈。
On his left wrist was a complicated-looking watch with a brown, sweat-stained leather band.
腕 戴着一块外表很复杂的手表，棕色皮表带汗渍斑斑。
On his left wrist was a complicated-looking watch with a brown, sweat-stained leather band.
腕 戴着一块外表很复杂的手表，棕色皮表带汗渍斑斑。
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