You have to use the correct hand shape.

你必须使用正确的手型。

youdao

Up to now, many traits in human body have been applied, such as fingerprint, palmprint, iris, face, hand shape and signature, etc.

截至目前，已经用于身份识别的人体生物特征包括指纹、掌纹、虹膜、人脸、手形、签名等。

youdao

Today, he employs about 3,000 'benders,' who spend three months learning how to hand-shape the glass into spirals.

现在他雇了大约3,000名“弯管工”，这些人要花三个月的时间学习如何手工将玻璃弯成螺旋形。

youdao

One of the hands keeps a flat hand shape and it just kind of lightly moves back and forth as if it were a flickering image on a screen."

VOA: special.2011.04.13

They become sticky and harden into the shape of the letter C, like a sickle, a hand tool with a curved blade.

VOA: special.2009.12.16

Alpha hand shape, common in pocket watches, adds a slightly archaic flavor to dial.

FORBES: The Face of Time

If, say, hand shape could not change independently of foot shape, selection could not make back feet suitable for walking while leaving the ape with usable hands.

ECONOMIST: A master of evolution takes a last long look at Darwin

One day, while working on a bed with hexagonal-shaped posts, Green became exasperated with how long it took to hand-shape pieces.

FORBES: Green Wood