The insect's wings are almost transparent.

这昆虫的翅膀几乎是透明的。

《牛津词典》

He stroked his shaven chin with his thin hand; the veins stood out on it and it was almost transparent.

他用瘦小的手摸了摸剃得光光的下巴；手上青筋鼓起，手白得几乎透明。

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These jellies are almost transparent: the best way to spot them is to look for their shadows on the ocean floor.

这些水母几乎是透明的：发现它们最好的方法是寻找海床上的阴影。

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As they open their eyes, they are almost transparent.

NEWYORKER: Labyrinth

Though the carbon nanotubes absorb infra-red light, they are almost totally transparent to the visible variety.

ECONOMIST: Monitor

As it happens, the coffee-like stains that he and his colleagues had been trying to remove with fast-drying solvents was actually the solution to his problem, since they remained in contact with each other as they dried and preserved conductivity, but left about 95 percent of the light through the holes in the center, thereby making the screen itself almost fully transparent.

ENGADGET: Coffee-like stains inspire new type of touchscreen