“standard time”的概念、定义、翻译、参考文献-科学参考

standard time

Astronomy

The civil time within a country, or within a time zone on Earth. It usually corresponds to the mean solar time on some meridian of longitude within the country. Standard time usually differs from Universal Time by an exact number of hours, although in some countries half-hour differences are used.

Space Exploration

The four standard times officially used in the USA to record space shuttle launches and landings. Those at the Kennedy Space Center in Florida occur during Eastern Standard Time (EST) from 2 am on the last Sunday in October until 2 am. on the first Sunday in April. They happen during Eastern Daylight Time (EDT) the rest of the year. Landings at Edwards Air Force Base in California occur during Pacific Standard Time (PST) from 2 am on the last Sunday in October until 2 am the first Sunday in April. The rest of the year they happen during Pacific Daylight Time (PDT).
EST is five hours behind Universal Time Coordinated (UTC); PST is three hours behind EST and eight hours behind UTC.

单词	standard time
释义	standard time Astronomy The civil time within a country, or within a time zone on Earth. It usually corresponds to the mean solar time on some meridian of longitude within the country. Standard time usually differs from Universal Time by an exact number of hours, although in some countries half-hour differences are used. Space Exploration The four standard times officially used in the USA to record space shuttle launches and landings. Those at the Kennedy Space Center in Florida occur during Eastern Standard Time (EST) from 2 am on the last Sunday in October until 2 am. on the first Sunday in April. They happen during Eastern Daylight Time (EDT) the rest of the year. Landings at Edwards Air Force Base in California occur during Pacific Standard Time (PST) from 2 am on the last Sunday in October until 2 am the first Sunday in April. The rest of the year they happen during Pacific Daylight Time (PDT). EST is five hours behind Universal Time Coordinated (UTC); PST is three hours behind EST and eight hours behind UTC.
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