1.

1. Dikes protected the lowland from incursions of the sea.
    堤防保护低地免于海水流入。

1. 入侵：任务39 入侵(Incursion) 由于哥巴将军手中拥有携带核子弹头的远程弹道导弹(SCUD),问题变得更加棘手,无论如何需要搞到控制密码之类的情报,为此盖斯托夫斯基少校只身来到哥巴将军住处附近.

2. 进入,入侵,袭击：incur 陷於,惹起 | incursion 进入,入侵,袭击 | intercouse 交际,交通,灵交,(思想,感情等)交流

3. 袭击：incurrent 向内流的 | incursion 袭击 | incursionary 侵略的

4. 侵入：incleasing precision 一層厳密に | incursion 侵入 | indefinite 不確定

1. 袭击;侵犯;侵入
    If there is an incursion into a country, enemy soldiers suddenly enter it.

    e.g. ...armed incursions into border areas by rebel forces.
           叛军武装入侵边境地区

2. 涌入;侵入;传入
    If someone or something enters an area where you would not expect them to be, or where they have not been found before, you can call this an incursion, especially when you disapprove of their presence.

    e.g. Traditional crafts remain remarkably unchanged by the slow incursion of modern ways.
           传统工艺继续保持原有的特色,没有因现代化手段的缓慢引入而改变。
    e.g. ...her disastrous incursion into the property market.
           她非常不明智地转入房地产市场

1. the act of entering some territory or domain (often in large numbers)

    e.g. the incursion of television into the American living room

2. the mistake of incurring liability or blame

3. an attack that penetrates into enemy territory

    Synonym: penetration