清逸斋主 给 jmz666 点“赞”支持3银元奖励！！

点赞不显,在此加赞.

(^-^) Weiggg 给 jmz666 送上一瓶哈哈可乐！

Weiggg 给 jmz666 点“赞”支持3银元奖励！！

金色加州 给 jmz666 点“赞”支持3银元奖励！！

sc7s 给 jmz666 点“赞”支持3银元奖励！！

宽 给 jmz666 点“赞”支持3银元奖励！！

回复:1 楼 Tidal BasinTwice a day at high tide, 250 million US gallons of water from the Potomac River enter the Tidal Basin through the inlet gates. As the tide turns, water trying to flow out of the inlet gates causes the gates to close, and the outlet gates on the Washington Channel side of the Basin open. The rush of water out of the Tidal Basin sweeps away any silt or sediment build up inside the Washington Channel, keeping it navigable

jmz666 给 jmzjmz 点“赞”支持3银元奖励！！

已经给本帖加上 10 银元！

Tidal BasinTwice a day at high tide, 250 million US gallons of water from the Potomac River enter the Tidal Basin through the inlet gates. As the tide turns, water trying to flow out of the inlet gates causes the gates to close, and the outlet gates on the Washington Channel side of the Basin open. The rush of water out of the Tidal Basin sweeps away any silt or sediment build up inside the Washington Channel, keeping it navigable