Three cruisers and three destroyers were heavily damaged or destroyed.是什么意思？

Three cruisers and three destroyers were heavily damaged or destroyed.

三艘巡洋舰和三艘驱逐舰受到严重损失或被摧毁.

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

例句
Outsiders who wed islanders are given only three years' right of abode at first.
岛外的人和岛民结婚之初只能获得三年的居住权。

cruisers

n. 巡洋舰( cruiser的名词复数 )；

例句
Italy had lost three cruisers and two destroyers.
意大利损失了3艘巡洋舰和2艘驱逐舰。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

destroyers

n. 驱逐舰( destroyer的名词复数 )，破坏者；

例句
They moved two destroyers into the area to counter the threat from the enemy battleship.
他们开了两艘驱逐舰进入这个地区,来反击敌人战舰的威胁.

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

heavily

adv. 在很大程度上，沉重地，大量地，缓慢又高声地；

例句
The killer must have been heavily bloodstained.
凶手肯定身上血迹斑斑。

damaged

adj. 被损坏的；v. 损害，毁坏，加害于( damage的过去式和过去分词 )；

例句
The bomb destroyed a police station and badly damaged a church...
炸弹摧毁了一处警察局，并使一座教堂严重受损。

or

conj. 或，或者，还是，不然，否则，左右；prep. <古、诗>在…之前，比…更早；n. [纹章]黑金色、黑色；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

destroyed

v. 破坏( destroy的过去式和过去分词 )，毁灭，消灭，杀死；

例句
Weeks of aerial bombardment had destroyed factories and highways...
数周的空中轰炸已经摧毁了许多工厂和公路。