As Mivart well says, on page 118 of his Genesis of Species, "Not only does it appear that there are barriers which oppose change in certain directions, but that there are positive tendencies to development along certain special lines.
In short, the efforts of all breeders are largely directed to fighting against the tendencies which animals display towards variation in certain directions.
That, in such a case, there should be unanimity is not necessary; it is enough that the current of belief, in certain directions, be overwhelming.
A yellowish cast of color may be seen in certain directions in it also, which will aid in distinguishing it from other purple stones.
Other hard stones have a pronounced cleavage and split easily in certain directions.
With a singly refracting mineral, or with glass, or with a doubly refracting mineral when viewed in certain directions of the crystal (which do not yield double refraction) the colors will be alike in the two squares.
Other stones, while fairly hard and reasonably tough in certain directions, have nevertheless so pronounced a cleavage that they do not wear well if cut, and are sometimes very difficult to cut at all.
Here the student finds himself released from the restraints previously imposed upon his private life,* though the class-will continues to rule him in certain directions.
The highest official is not able with impunity to impose his personal will in certain directions; and, for the time being, it is probably better that his powers are thus restrained.
Conspicuously lacking in certain directions, it is as conspicuously prominent in others.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "certain directions" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.