名詞 half length:

1. a portrait showing the body from only the waist up
   同義詞：half-length

形容詞 half length:

1. representing only the upper half of the body
   同義詞：half-length
2. abridged to half its original length
   同義詞：half-length

1. A stitch made by inserting the needle at the midpoint of a preceding stitch so that the stitches overlap by half lengths.
   回針縫在先前縫的一針中間加縫的一針，以便使針腳的交錯重疊為原來長度的一半