跑步者的背心上装有反光条，这样在夜间更容易被看到。

The runner's vest has ___reflectors to make him more visible at night.

自行车上的反光片帮助夜间行驶时更容易被看到。

The ___reflectors on the bike make it more visible when riding at night.

录音棚墙壁上安装了特殊的声波反射板来改善音效。

The studio walls have sound ___reflectors to improve audio quality.