用法:
1 thin covering of metal, esp silver or gold, on another metal 极薄的金属（尤指 金或银）的镀层或包层:
The plating is beginning to wear off in places. 镀层有的地方已经磨掉了.

用法:
2 layer or covering esp of metal plates 层, 外层（尤指金属板）:
protected with steel plating 用钢板防护的.

• at one's best(in one's best)
• at one's discretion(to one's discretion)
• at one's heels(on one's heels, under one's heel)
• at one's pleasure(with pleasure)
• at one(in one)
• at one(to one)
• at pains(at the pains)
• at peace(in peace)
• at play(in play)
• at pleasure(at one's pleasure)
• at quiet(in quiet)
• at quiet(on the quiet)
• at risk to(at the risk of)
• at risk(at one's (own) risk)
• at sb's command(in sb's command)
• at school(in school)
• at sight of(at the sight of, in sight of)
• at sight(in sight)
• at stake(at the stake)
• at table(at a table)
• at table(at the table)
• at that rate(at this rate)
• at that(in that)
• at the age of(in the age of)
• at the back of(at the rear of, in the back of, in the rear of)