Sentence examples for two are necessary from inspiring English sources

As male sexual partners only two are necessary.

That is, two layers in addition to the lower three are sufficient for all values of n, and two are necessary if n≥7.

R. sphaeroides has at least 6 CheY homologues and a minimum of two are necessary for chemotaxis; CheY6 and either of CheY3 or CheY4.

Of these six planarian homologs, two are necessary for normal tissue homeostasis, and the loss of another, Smed-dynA-1, leads to an abnormal behavioral phenotype, which we have quantified using automated center of mass tracking.

Thus, balancing the two is necessary for a sustainable and comfortable building stock.

A majority of one was sufficient for acquittal, but a majority of two was necessary for conviction.

They scoffed at the news media's implications of a Knicks-Nets rivalry, asserting that an intense playoff series or two was necessary for that.

A distinction between the two is necessary.

Learning the balance between the two is necessary.

All three are necessary for advancement.

All three are necessary after the Bush years.