We move out in 3 days, when the moon is full and the tide is high.

我们将在三天后出发，趁着月满潮涨。

She'd slipped out of her collar, runaway and gotten trapped in southern England's Mud Flats which can flood when the tide is high.

它挣脱项圈逃跑了，却被困在了英格兰南部的泥滩上，那里涨潮时可能会被水淹没。