Even rudimentary feathers on forelimbs could have expanded the arm's surface area to enhance lift slightly.

即使是前肢发育不全的羽毛也能扩大手臂的表面积，以略微提高升力。

youdao

In this rudimentary natural society men go out to hunt and fish and to fight off the tribe next door while women keep the fire going.

在这个原始的自然社会里，男人出去打猎、捕鱼、击退隔壁部落，而女人则继续生火。

youdao

He brought his equipment to the Zolder care centre, where a rudimentary breakthrough took place.

他把设备带到佐德尔的护理中心，并在那里取得了初步的突破。

youdao

"You don't have to have access to high levels of al-Qaida or the Taliban to get rudimentary tradecraft and bomb-making training."

VOA: standard.2010.05.18

It has done little to tackle the rudimentary problem in Russia's agricultural sector -- namely the absence of institutionalized ownership of land -- and has likely retarded the privatization process.

CENTERFORSECURITYPOLICY: Center For Security Policy

Having served a three-year apprenticeship in England, they recently returned to Uganda to build the first rudimentary foundry on the Kasese site.

ECONOMIST: Rwenzori Sculpture Foundation

Sources close to the investigation indicated they were rudimentary and did not appear to have been made by someone with paramilitary training in bomb-making.

BBC: Parcel bombs sent to Neil Lennon, McBride and Godman