The technology of cloning has shaken the age of natural multiplication of human beings and brought forth a series of social problems.

克隆技术的出现打破了人类靠自然繁衍规律支配的时代，给人类社会带来一系列社会问题。

youdao

Here we have used the associative law or the cancellation law for multiplication, which are satisfied for natural Numbers, now we assume they are satisfied with fraction Numbers.

这里我们用到了乘法结合律也可以用消去律，本来这些运算律是对正整数乘法适用的，但对于有分数参加的乘法我们也规定适用。

youdao

Over the past decade, there has been a multiplication of collaborative research efforts involving indigenous peoples and natural and social scientists.

UNESCO: NATURAL SCIENCES

One of the most innovative developments since the last IPCC report in 2007 has been a multiplication of collaborative research efforts involving indigenous peoples and natural and social scientists.

UNESCO: Ecological Sciences for Sustainable Development