Many dolphins are accidentally killed through entanglement with fishing equipment.是什么意思？

Many dolphins are accidentally killed through entanglement with fishing equipment.

很多海豚因为被渔具缠住而意外死亡。

many

adj. 许多，多的；pron. （与复数动词连用）大多数人；

例句
There are many people who still find the act of abortion abhorrent.
仍有很多人对堕胎行为表示厌恶。

dolphins

n. 海豚（ dolphin的名词复数 ）；

例句
Many dolphins are accidentally killed through entanglement with fishing equipment.
很多海豚因为被渔具缠住而意外死亡。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

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。

accidentally

adv. 偶然地，意外地，非故意地；

例句
He accidentally electrocuted himself.
他意外触电身亡。

killed

adj. 被杀死的，断开的；v. 杀死( kill的过去式和过去分词 )，使停止[结束，失败]，破坏，减弱，抵消，使痛苦，使受折磨；

例句
Six passengers were killed in the accident.
六名乘客在车祸中丧生。

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

例句
The proposal was instantly voted through with two to one in favour, accompanied by enthusiastic applause...
在热烈的掌声中，提案以2比1的优势很快通过了表决。

entanglement

n. 瓜葛，牵连，纠缠，缠住；

例句
...a military and political entanglement the Government probably doesn't want.
政府可能并不想看到的军政之间的纠葛

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

fishing

n. 捕鱼，钓鱼，渔业，捕鱼术，捕鱼权；v. 捕鱼(fish的现在分词)；adj. 钓鱼的，钓鱼用的；

例句
...ancient fishing rights.
由来已久的捕鱼权

equipment

n. 设备，装备，器材，配件，（工作必需的）知识，素养；

例句
All this equipment has received international acclaim from the specialist hi-fi press.
这套设备受到全球高保真音响专业报刊的赞誉。