Yet so strong is the appearance of this having occurred that naturalists can hardly avoid employing language having this plain signification. 查尔斯·达尔文.物种起源.
The attractive power of amber is mentioned by Theophrastus and Pliny, and from them by later naturalists. 本杰明·富兰克林.富兰克林自传.
Naturalists continually refer to external conditions, such as climate, food, etc. 查尔斯·达尔文.物种起源.
I formerly spoke to very many naturalists on the subject of evolution, and never once met with any sympathetic agreement. 查尔斯·达尔文.物种起源.
Until recently the great majority of naturalists believed that species were immutable productions, and had been separately created. 查尔斯·达尔文.物种起源.
It has been named by naturalists _Pithecanthropus erectus_ (the walking ape-man). 赫伯特·乔治·威尔斯.世界史纲.
No one definition has satisfied all naturalists; yet every naturalist knows vaguely what he means when he speaks of a species. 查尔斯·达尔文.物种起源.
I may venture to express my conviction of the high value of such studies, although they have been very commonly neglected by naturalists. 查尔斯·达尔文.物种起源.
Why, it may be asked, until recently did nearly all the most eminent living naturalists and geologists disbelieve in the mutability of species? 查尔斯·达尔文.物种起源.
I think it will be admitted by naturalists, without my entering on details, that secondary sexual characters are highly variable. 查尔斯·达尔文.物种起源.
Here naturalists are divided. 本杰明·富兰克林.富兰克林自传.
This principle has been broadly confessed by some naturalists to be the true one; and by none more clearly than by that excellent botanist, Aug. 查尔斯·达尔文.物种起源.
With respect to many of these forms, hardly two naturalists agree whether to rank them as species or as varieties. 查尔斯·达尔文.物种起源.
Naturalists, as we have seen, try to arrange the species, genera and families in each class, on what is called the Natural System. 查尔斯·达尔文.物种起源.
At the present day almost all naturalists admit evolution under some form. 查尔斯·达尔文.物种起源.
For the highest clouds cannot rise above two miles, as naturalists agree, at least they were never known to do so in that country. 乔纳森·斯威夫特.格列佛游记.