周二发布的一项研究显示，自19世纪30年代以来，加州已经失去了一半的大树。

California has lost half its big trees since the 1930s, according to a study to be published Tuesday.

youdao

事实上，18世纪后期欧洲人抵达之时，土著人还在练习掌握这种艺术形式，某些图像显示了他们之间的联系。

In fact, the Aborigines were still practising this art form in the late 18th century, when the Europeans began to arrive, and certain images point to the contact between them.

youdao

世卫组织调查显示，在向世卫组织提供数据的124个国家中，有56个发现无偿自愿献血有所增加。

The WHO survey shows that out of the 124 countries that provided data to WHO, 56 saw an increase in unpaid voluntary donation.

youdao