variable density goggles造句

例句与造句

1. "' Variable density goggles "'were used by U . S . aerial gunners and anti-aircraft gunnerss in World War II . They were equipped with a turning dial on the front allowing the pilot to alter the tint of the lens enabling them to see tracer rounds and not be easily blinded.
2. It's difficult to find variable density goggles in a sentence. 用variable density goggles造句挺难的