The custom of gift-giving on Christmas began with the Roman festivals of Saturnalia and Kalends.

圣诞节赠送礼物风俗源于罗马神农节和朔日节。

Scientists speculate on the origin of the universe.

科学家们猜测宇源。

The origins of some words are unknown.

些词源是知。

Sardinia's origins are lost in the mists of time .

撒丁王国源已湮没在时间迷雾中。

Darwin generalized from many facts to reach his idea about the origin of man.

达尔文对许多事实加以归纳, 得出了他对于人类源观点。

We cannot yet satisfactorily explain the genesis of the universe.

我们仍能令人满意地解释宇源。

The Appaloosa was named by French trappers for the Palouse River in neighboring southeast Washington.

些是交叉品种。名字源于同种族或种族酋长。

Lateral root Any ROOT that arises from the PERICYCLE of another root.

源于根中柱鞘根。

She embarked on a discourse about the town's origins.

她开始讲本市源。

The chief of these questions respect the origin of exogamy and of endogamy.

些问题中最首要同外婚制和内婚制源有关。

Italian and Spanish are kindred languages.

意大利和西班牙语言源是相同。

A new theory of the origin of language is the most prominent feature of the book.

关于语言源新理论是本书显著一个特点。

On Paphiopedilum malipoense sp. nov.-- an intermediate form between Paphiopedilum and Cypripedium, with a discussion on the origin of the genus.

麻栗坡兜兰 -- 兜兰属与杓兰属一个中间类型，兼论兜兰属地理源问题.

4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.

涡虫是雌雄同体，生殖系统适于体内受精。单源吸虫（单殖纲）大多是鱼外寄生虫。

K.).The thesis title is: The "Foreignness" of the Foreign Woman in Proverbs 1-9: A Study of the Origin and Development of a Biblical Motif.

她论文题目是──箴言一至九章�外女之她[外族]身份：探讨一个圣经主题源及发展。

After studying the mental mechanism of language source and evolution through exploring the "past" of anthropogenesis and its development, we can grasp the process of language evolution.

只有通过对人类源及发展“过去”寻根究底，来探究语言源与进化心理机制，才能把握语言进化历程。

"This is important research because it supports the out-of-Africa theory about the origin of modern humans," said Ranjan Deka, a population genetics researcher at the University of Cincinnati.

“是个重要研究成果，因为它支持了有关现代人类源“非洲源说””，辛辛那提大学人类遗传学研究员Ranjan Deka说。