262. The scientists checked the data for all possible natural influences such as the lunar cycle as well as random variations and found neither to be at play.

英语四级译文:
科学家检查了所有自然界可能影响的信息，例如月球周期，以及随机变异，却发现两者都没有产生影响。

四级词汇讲解:
本句的主干是scientists checked data and found neither。for all possible natural influences为data的后置定语;such as...为natural influences的补语，其中as well as起到了并列连接作用;to be at play为neither的宾语补足语。

such as的意思是“例如，诸如”，用于举例说明。如:
The town is still reliant on traditional industries such as farming and mining.该镇仍然依赖于务农和采矿之类的传统产业。

as well as的意思是“也，又，还”。如:
They sell books as well as magazines.他们既卖书也卖杂志。

at play此处的意思是“起作用”，还可指“在玩耍”。如:
I can hear the happy laughter of children at play.我能听到孩子们玩耍时欢快的笑声。

英语四级考点归纳:
such与as的常见组合及用法如下:

※ as such意为“从字面意义来看，严格说来”。如:
My new job is not a promotion as such.我的新职务算不上真正的晋升。

※ such as还可指“像……这样，诸如……之类”。如:
Opportunities such as this did not come every day.这样的机会不是每天都有的。

※ such...as意为“……的那些”。如:
Such food as they gave you was warm and nutritious.他们给你的食物是热的，而且很有营养。