1. In many big cities, congestion in the rush hour is so serious that taking a bus proves a dreaded ordeal.
    在许多大城市里，高峰时的交通非常拥挤，这时乘公共汽车真是一场可怕的经历。

1. 充血：身体器官的病理变化,一般而言,几乎所有器官都会发现多发性的出血、充血(congestion)及细胞退化(cellular degeneration)的现象. 通常小脑对热的伤害较为敏感,因此步态不稳常是最早出现的症状. 脑部则可见到脑水肿、出血、充血等现象.

2. 淤血：槟榔肝(Nutmeg liver) 心衰细胞 血栓形成 贫血性梗死(Anemic infarct)微血栓 淤血(Congestion) 静脉石 栓子 肺褐色硬化 梗死 栓塞出血性梗死 透明血栓(hyaline thrombus) 漏出性出血 羊水栓塞 出血峰窝织性炎症 渗出 积脓(empyema

3. congestion：cong; 拥塞

1. 堵塞;拥堵
    If there is congestion in a place, the place is extremely crowded and blocked with traffic or people.

    e.g. The problems of traffic congestion will not disappear in a hurry...
           交通拥堵问题不会一下子就消失。
    e.g. Energy consumption, congestion and pollution have increased.
           能源消耗、交通堵塞以及污染状况愈加严重。

2. (身体部位的)堵塞，充血，淤血
    Congestion in a part of the body is a medical condition in which the part becomes blocked.

    e.g. ...nasal congestion.
           鼻塞

1. excessive crowding

    e.g. traffic congestion

    Synonym: over-crowding

2. excessive accumulation of blood or other fluid in a body part