Instead of a thin ray you can change the shape used for picking.

代之以一根细细的射线，你可以改变拣选时使用的形状。

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Thin wall box shape section is a kind of structure generally adopted for machines.

薄壁多室箱形截面是机械结构中常见的一种结构形式。

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Instead of a thin ray you can change the shape used for picking.

代之以一根细细的射线，你可以改变拣选时使用的外形。

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The balance spring is etched out of a thin silicon wafer using a photolithographic technique, similar to that used for microelectronic chips, so its exact shape and thickness can be more carefully controlled than with metal.

ECONOMIST: A luxury watchmaker is putting silicon in its timepieces

Campion also thinks Winslet is a girl for her time, because "she has got a body shape which is individual and beautiful and not excessively thin".

BBC: Holy Smoke: Winslet's back