什么是gray salt，gray salt怎么用？什么样子的？

gray
KK: []
DJ: []
a.
1. 灰色的;偏灰的
His hair is gray.
他头发灰白。
2. 灰白头发的[F]
He was already gray at 30.
他三十岁时头发就已经灰白了。
3. (指脸因恐惧、生病等)苍白的
He was still looking gray and very tired.
他看上去仍然面色苍白,疲惫不堪。
4. 阴暗的;阴郁的
It was a gray day.
那是个阴天。
n.
1. 灰色[C][U]
2. 灰色颜料;灰色衣服[U]
They were dressed in gray.
他们穿着灰色衣服。
3. 暗淡的光线[U]
vt.
1. 使成灰色(或灰白)[(+with)]
Sorrow has grayed his head.
忧伤使他头发变得灰白。
vi.
1. 成为灰色(或灰白)
He's graying at the temples.
他两鬓的头发正在变得花白。

SALT
abbr.
1. =Strategic Arms Limitations Talks (美国与前苏联之间的)限制战略武器谈判
salt
KK: []
DJ: []
n.
1. 盐[U]
2. 【化】盐(类)[C]
3. 风趣,兴味,刺激性[U]
His vivid touch added salt to the story.
他生动的笔法给故事增添了趣味。
4. 谨慎态度;保留[U]
a.
1. 咸水的[B]
2. 含盐的,咸(味)的
The fried chicken is too salt.
那炸鸡太咸了。
3. 盐腌的[B]
4. (故事、笑话等)猥亵的,下流的
vt.
1.