You can use the -p option to preserve the ownership, permissions, and times for each file and directory you copy: $ cp -pr source destination.

可以使用 -p 选项保留复制的每个文件和目录的所有者、权限和时间：$ cp -pr source destination。

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The surface body electrocardiogram(ECG) manifestations of biatrial pacing are that P wave duration shortens, the polarity of P wave changes to negative, PR interval gets shorter correspondingly.

双房同步起搏体表心电图表现为P波时限短、负向或正负双向，PR间期相应缩短。

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The PSQI scores of CP-patients were lower than those of PR-patients after treatment(P<0.01).

综合组治疗后的PSQI评分显著低于放松组（P<0.01）。

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Mail to: Internal Revenue Service, CC:PA:LPD:PR (Notice 2011-36), Room 5203, P.

FORBES: IRS Asks for Input on Health Care Law