chalking
灰化
Chalk, v. t. [imp. & p. p. Chalked p. pr. & vb. n. Chalking.]
1. To rub or mark with chalk.
2. To manure with chalk, as land.
3. To make white, as with chalk; to make pale; to bleach.
Let a bleak paleness chalk the door. --Herbert.
To chalk out, to sketch with, or as with, chalk; to outline; to indicate; to plan. [Colloq.] “I shall pursue the plan I have chalked out.”
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