One example is that lipids spontaneously form liposomes, the hollow bilayered vesicles that must have yielded the cell membrane.

一个例子是脂质自发形成脂质体，这种中空双层囊泡必须让出细胞膜。

youdao

This method is used to form hollow objects out of thermoplastic materials.

使用这种方法，形成中空物体的热塑性材料。

youdao

I filled it with a full radius form and gave a depth to it to obtain the shape of a hollow tube.

我用一个全半径的形式把它填满，并给它取了一个深度，这样椅子看起来就有了中空管的形状。

youdao

For both modes of crystal fibre, the pattern of holes is generated by stacking hollow glass tubes a millimetre or so in diameter to form a rod several centimetres thick.

ECONOMIST: A new approach to making optical fibres

The hollow body, made of mulberry wood, is shaped in the form of a figure eight and is held horizontally, while the eleven metal strings are plucked with a plectrum.

UNESCO: MEDIA SERVICES

While Woods ended a 30-month wait for a PGA Tour title at the Arnold Palmer Invitational in March, he then struggled to maintain that form as he finished 40th at the Masters, missed the cut at Quail Hollow and then tied for 40th at the Players Championship.

CNN: STORY HIGHLIGHTS