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Kekule made his classical proposal that the six carbon atoms of benzene were arranged in a hexagon.

It has been proposed (or speculated, or suggested) that a series of reactions is involved.

He suggested that there should be two gas diffusion terms.

Goldbach conjectured that every even number...

He proposed that both attractive and repulsive forces could exist between atoms.

It is speculated that the oxygen resulted from the bombardment of the seas by certain wavelengths of ultraviolet light.

Scientists theorize that the planets in our solar system formed at...

It was conjectured that the eukaryotes had eliminated the need for... (биол.).

The suggestion has been made that the underlying asthenosphere has an undulating upper surface.

He reasoned (or argued, or hypothesized) that erosion must be burying layers of sediment under...

Kekule made his classical proposal that the six carbon atoms of benzene were arranged in a hexagon.

It has been proposed (or speculated, or suggested) that a series of reactions is involved.

He suggested that there should be two gas diffusion terms.

Goldbach conjectured that every even number...

He proposed that both attractive and repulsive forces could exist between atoms.

It is speculated that the oxygen resulted from the bombardment of the seas by certain wavelengths of ultraviolet light.

Scientists theorize that the planets in our solar system formed at...

It was conjectured that the eukaryotes had eliminated the need for... (биол.).

The suggestion has been made that the underlying asthenosphere has an undulating upper surface.

He reasoned (or argued, or hypothesized) that erosion must be burying layers of sediment under...

This theory includes the premise that a strong lithosphere rests upon...

Reasonable guesses (or conjectures, or inferences, or suppositions, or assumptions, or presumptions) as to the shapes of molecules can be made.

A large number of geologists were skeptical about the proposal that the crust of the ocean floor is spreading apart...

The most likely conjecture (or speculation) is that the very centre of the Milky Way harbours a black hole.

This mechanism is presumed to be adequately represented by...

You may anticipate that the stream discharge will increase with increasing basin area.

It was originally conceived (or conjectured) that the hydrogen bonds were responsible for...

These forms can be surmised.

He speculated that the lower mantle was inhomogeneous.

The concept of a delocalized π bond suggests orbital occupancy by more than two electrons.

The existence of superclusters has long been conjectured (астрон.).

The design procedure assumes uniform pressure.

It can be inferred (or assumed) that the absorption will be different as well.

One can infer that craters have been erased.

The theory proposes that there are three or more types of...

One may speculate that these two satellites are richer in water than...

The liquid temperature will be assumed (as) constant at 122°F.

In such cases covalent bonding may be inferred.

If "1" be taken as 10 cm,...

If a homogeneous medium is thought of as being constituted of...

Conventional definitions of environmental extremes presuppose protection of electronic gear by cooling and heating.

He surmised that the amount of methane on Titan must be far greater than...

For weakly guiding fibres, we anticipate that ε will be small...

The heat death of the universe that was contemplated by physicists in the 19th century...