第三人称单数： reproduces
过去式： reproduced
过去分词： reproduced
现在分词： reproducing

Sperm cells must be produced for men to reproduce .

对于成年男性，精子则是为了繁殖。

The next step seems inevitable : technology will reproduce itself .

下一步似乎是必然的：技术将会自己繁殖。

But the rest can play a role in how well organisms survive and reproduce .

但是其它一些变异则对一个物种的生存和繁殖意义重大。

Sharks grow slowly and take years to reproduce , which makes them vulnerable to overfishing .

鲨鱼生长缓慢，需要数年才能繁殖，这使得它们容易受到过度捕捞。

They are also hard to reproduce with colour photocopiers .

即使是彩色复印机也很难复制这种图象。