ebb-and-flow structure

... ebb and flow zone 潮涨落地带 ebb-and-flow structure 涨落潮流构造，潮流涨落构造 at a low ebb 处于低潮,衰退,萧条 ...

... ebb and flow zone 潮涨落地带 ebb-and-flow structure 涨落潮流构造，潮流涨落构造 at a low ebb 处于低潮,衰退,萧条 ...