We take full database backups of all databases at 4 AM, 4 PM, and 12 AM.

我们在早上四点、下午四点和晚上12点会对所有数据库做全备份。

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Flight AF 447 left Rio de Janeiro on Sunday at 7 pm (6 am, Beijing time) and had been expected to land at Paris`s Roissy Charles de Gaulle airport Monday 11:15 am (5:15 pm, Beijing time).

据悉，失踪的AF447航班于上周日晚7点（北京时间凌晨6点）从里约热内卢起飞，预计于本周一早11：15（北京时间下午5：15）抵达巴黎戴高乐机场。

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The method is based on AM-AM?AM-PM characteristics of a nonlinear power amplifier and application of band -pass nonlinearity theory and digital signal processing techniques.

根据功放的实测AM-AM、AM-PM特性，采用时域分析方法，并应用带通非线性理论和数字信号处理技术，分析了宽带数字调制信号激励下的射频功率放大器非线性失真特性。

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It's a free music and art festival, it will be 11 am to 7 pm, all day and night.

这是一个免费的音乐艺术节，上午11点到晚上7点，一整天。

请记住我 - SpeakingMax英语口语达人

The bus, launched in April 2012, takes advanced bookings as well as cruises the Strip for unfortunate souls, every Friday through Sunday, 8 am to 4 pm, and on weekdays 9 am to 1 pm.

BBC: Hangover help from a Las Vegas bus

Bicycles are not allowed on green-line trains or silver-line buses, nor are they allowed on any train during rush hours (7 am to 10 am and 4 pm to 7 pm Monday through Friday).

BBC: In Boston, leaf peeping by bike

You can take your bike on any of the MBTA subway lines except the green and silver lines, but you must avoid rush hours (7 am to 10 am and 4 pm to 7 pm weekdays) and always ride on the last train car.

BBC: Boston��s great outdoor adventures