tail up and down the stream

隨著潮水漲落而起伏

(of the tide)start to come in or go out

（指潮水）開(kāi)始漲或落

The tide ebbs and flows twice in 24 hours.

潮水每24 小時(shí)漲落兩次。

Every tide have its ebb.

潮水有漲落，人生有盛衰。

the high [low] watermark

(漲 [落] 潮時(shí)的) 最高 [最低] 水位標(biāo)

A line or an artificial indicator marking the high-water or low-water limit of the tides.

潮痕標(biāo)記漲潮和落潮時(shí)潮水邊緣的線或人為的標(biāo)記

Is the tide coming in or going out?

現(xiàn)在是漲潮還是落潮?

The flood and ebb tides alternates with each other.

漲潮和落潮交替更迭。

The tide of commuters ebbed and flowed.

乘公交車輛上下班的人流，像潮水一樣時(shí)漲時(shí)落。

The study of hydrodynamic characteristics of flood and ebb channels and channel type judgment

河口漲落潮槽水動(dòng)力特征及河槽類型判定

It was the best time for snorkeling, since the visibility at high tide is not good enough and the water is too shallow at low tide.

這是潛水的最好時(shí)候，因?yàn)闈q潮時(shí)能見(jiàn)度不夠高，而潮落時(shí)水又太淺。

Water level upstream is higher than that downstream during the ebb tide, and water level descent of ebb tide is one order bigger than that of flood tide.

落潮期間上游水位均大于下游水位,水面坡降落潮比漲潮大一個(gè)數(shù)量級(jí);

the rhythm of the tides, seasons

潮汐的漲落、 四季的循環(huán)

Results show that (a) the flood tidal duration is shorter than the ebb tidal one;

結(jié)果表明 :潮流歷時(shí)漲潮比落潮短 ;

the range and rotation during the flood is larger than during the ebb.

落潮歷時(shí)一般大于漲潮歷時(shí)，而落潮流速明顯大于漲潮；

At the lower reaches of the South Branch, the velocity of the ebb current is larger than that of the flood current and the ebb tide duration is longer than that of the flood.

在南支下游,落潮流大于漲潮流,落潮歷時(shí)大于漲潮歷時(shí);

(be)in a state of flux and reflux

處于潮漲潮落狀態(tài);[喻](人、事)榮枯, 盛衰

(be) in a state of flux and reflux

處于潮漲潮落狀態(tài); [喻](人、事)榮枯, 盛衰