1. 发灰色的;石墨化：greyhounds 短立根 | greying 发灰色的;石墨化 | greyscale 灰度
2. 斑白：greyhound /灰狗/快速船/灰猎犬/ | greying /斑白/ | greylag /雁的一种/
1. But as well as pressure from the greying population, we should also learn about the advantages of an increasing group of senior citizens.
2. Neither the cost nor the greying economic climate is expected to dampen demand.
3. The greying of the population is already being felt, putting great strain on existing resources.