hand-held refraactometer是什么呀!仪器

Held the upper hand hand-held devices是什么意思 hand-held programmer是什么意思? hand-held是什么意思 hand-held 的意思是什么? hand-held refraactometer是什么呀!仪器 在这句许中held She held out her right hand and opened her palm! 手持这个单词应该怎样写才规范?是hand held,还是handheld,还是hand-held?我问的是handheld这个单词,不是问别的 ____,the teacher entered the classroom.A.Book in hand B.With book in his hand C.Held books she held me (by)the hand and said ,''you are a good boy.''为什么用by 英语翻译you create while moving to charge a hand-held device. hand HAND hand hand hand Hand hand