And officials at Port Lympne were delighted with the new arrival, especially as black rhinos are known for being difficult to breed in captivity.

句中的as引导原因状语从句。especially as 表示“尤其是因为”：林普尼港的官员对这只新出生的黑犀牛感到非常高兴，尤其因为黑犀牛以圈养困难著称。

especially as引导原因状语从句的更多例句：

He himself might not be able to afford to send her the money, especially as he has a young family. 他自己可能没有能力给她寄钱，特别是他还有一个建立不久的家庭。

It was a pleasure to visit Madeira, especially as I’ve never been there before. 去参观马德拉群岛是件让人高兴的事，尤其因为以前我没去过。

There’s never a dull moment in our house, especially as there are ten of us living here. 我们的房子里从来都不会有片刻枯燥无聊的，尤其是因为这里住着我们十个人。

I was frightened when I went to bed, especially as my room was so far up. 睡觉时我很害怕，尤其是因为我的房间远远地在高处。

It is strange that they should be sucli good friends, especially as they have nothing in common. 奇怪的是，他们竟然会是这么好的好朋友，特别是因为他们毫无共同之处。

注意，除以上用法外，especially as…中的as有时也引导时间状语从句。如：

He didn’t want to upset his father, especially as his mother was so ill. 他不想让父亲烦心，尤其是在母亲病得这么重的时候。

Many women, especially as they get older, develop lumpy veins in their legs. 许多妇女，尤其是年纪大了以后，腿上会现出疙疙瘩瘩的青筋。