A punctual person is in the habit of doing everything at the proper time and is never late in keeping an appointment.

一个守时的人养成了按时做事的习惯，这样的人言必信，行必果。

It is hard for energetic, quick-minded people to waste time, so they are often tempted to finish a job before setting out to keep an appointment.

精力充沛、头脑敏捷的人极不愿意浪费时间，因此他们常想做完一件事后再去赴约。

It was as though her first husband had died that moment, and she was keeping an appointment with another in the presence of his corpse.

就好像她的第一任丈夫在那一刻已经死去，她是在他的尸体面前与另一个人约会。

Is it not possible, then, that Mr. Renauld left the house to keep an appointment — possibly with the murderer — leaving the front door open for his return.

那么，雷诺先生有没有可能离开房子去赴约——可能是与凶手——留下前门让他回来。