In my own areas, in biological, biomedical science, we're seen interesting work having been done in early human embryos.

“在我自己的领域，生物制药领域，我们已经可以看到早期人类胚胎方面有了一些有意思的研究。”

The pupils had been ordered to lay aside their party frocks; and this having been done, they had returned to the schoolroom and huddled together in groups, whispering and talking excitedly.

学生们被命令放下他们的派对礼服。做完这些，他们回到了教室，三五成群地挤在一起，窃窃私语，兴奋地交谈着。

Here we see how potent has been the effect of the introduction of a single tree, nothing whatever else having been done, with the exception of the land having been enclosed, so that cattle could not enter.

在这里，我们看到引入一棵树的效果是多么强大， 没有做任何其他事情，除了围起来的土地， 所以牛不能进入。