At one time, Henry needed a grammar book for his study.

曾经有一段时间，亨利需要一本语法书来学习。

youdao

One tribe agreed to donate DNA for his study.

其中一个部落同意为他的研究捐献dna。

youdao

Whether a person can manage his time well is very important for his study.

一个人是否能管理好时间对他的学习来说是很重要的。

youdao

Fitzgerald says his randomized study provides additional support for previous studies that suggested doctors are sometimes waiting too long before beginning treatment for HIV-infected patients.

VOA: standard.2010.07.21

For his study, Mr. Schwarcz collected policies from the top-10-selling insurance groups in six states: North Dakota, South Dakota, Pennsylvania, Illinois, California and Nevada.

WSJ: Dodging a Home-Insurance Trap

Among the other DGA winners were Searching for Sugar Man director Malik Bendjelloul, who won the guild's documentary award for his study of the obscure singer-songwriter Sixto Rodriquez.

BBC: Ben Affleck wins Directors Guild award

But soon Rich had begun working on it, learning carpentry, building a wing for two new bedrooms and a bathroom and another wing for his study, turning the original house into an open-plan living room, dining room, kitchen.

NEWYORKER: Free Radicals