opaque

That window is so dirty; it almost looks opaque from all the accumulated dust.

(Chinese) 那扇窗户太脏了；由于积满了灰尘，看起来几乎不透明。

The containers were made of opaque plastic to prevent light from spoiling the medicine inside.

(Chinese) 容器是由不透明塑料制成的，以防止光线破坏内部的药物。

The technician had to opaque the glass slide to prevent light leakage during the experiment.

(Chinese) 技术员不得不将载玻片处理成不透明，以防止实验过程中漏光。

Special chemicals are used to opaque the surface of mirrors during the manufacturing process.

(Chinese) 在制造过程中，使用特殊化学品使镜子表面不透明。