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.
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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.