雕刻玉石的电动工具:a matter of public record的意思

a matter of public record的意思 It is a mere matter of form. Luck is a matter of preparation meeting opportunity. 请翻译英语短文：A Matter of Courage 关于勇气 a matter of course的意思是什么？谁能告诉我？ to name a few , a matter of doing , give rise to , the computer chip 什么意思? a public affair This situation has become a focus of public interest.的interest要加复数吗？ ministry of public security是什么意思？ There is a lot of --a-- --r in the sea.