美国历史博物馆的导览部主任罗泽尔说：“我想7月4号这一天是人们想来到这里，真的想借此和美国历史以及先民故事联系起来的时候。”
I think July 4th is the time that people come and they really want to connect with American history and with their stories, "says Andrea Lowther, director of visitor services for the museum."
无论导通时刻是否一致，同臂号晶闸管的关断截止时刻总是相同的。
Whether the turn-on time of the same arm thyristors was uniform or not, the turn-off time was always identical.
江苏沙河抽水蓄能电站2号机组在调试过程中曾出现上导瓦烧损事故。
The upper guide bearing pads of unit 2 in Jiangsu Shahe Pumped-storage Power Plant had been burned to damage during commissioning period.
绝缘粉末通过金属管导时，两者带上等值异号电荷。
When the insulated powder pass through the metalline pipe, both generate electrites of egualize in magnitude and opposite symbol.
美国历史博物馆的导览部主任罗泽尔说：“我想7月4号这一天是人们想来到这里，真的想借此和美国历史以及先民故事联系起来的时候。”
"I think July 4th is the time that people come and they really want to connect with American history and with their stories," says Andrea Lowther, director of visitor services for the museum.
美国历史博物馆的导览部主任罗泽尔说：“我想7月4号这一天是人们想来到这里，真的想借此和美国历史以及先民故事联系起来的时候。”
"I think July 4th is the time that people come and they really want to connect with American history and with their stories," says Andrea Lowther, director of visitor services for the museum.
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