北美东部时区 Eastern Time Zone
（重定向自Eastern Timezone）
北美东部时区（North American Eastern Time Zone），或称美国东部时间（The Eastern Time Zone，ET），主要包括北美东海岸和南美西海岸，其标准时间为UTC-5，夏令时间为UTC-4。
Eastern Timezone
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Eastern Time Zone 北美东部时区
（重定向自Eastern Timezone）
The Eastern Time Zone (ET) is a time zone encompassing 17 U.S. states in the eastern part of the contiguous United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama in Central America and the Caribbean Islands.
Places that use Eastern Standard Time (EST) when observing standard time (autumn/winter) are 5 hours behind Coordinated Universal Time (UTC−05:00).
- polymerizationdepolymerization equilibrium的意思
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- polymerization dosimetry的意思
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