Though scientists have no idea what it consists of, one popular theory is that dark matter is made up of WIMPs (Weakly Interacting Massive Particles).

虽然科学家还不清楚暗物质如何构成，不过一种通行的理论认为其由弱作用大质量粒子组成（WIMPs）

youdao

We believe most of the dark matter is made up of new particles smaller than atoms that are different from anything scientists have ever discovered and studied.

我们认为大多数暗物质是由比原子还小的新粒子构成，这些粒子与科学家们已发现和研究过的任何粒子都不一样。

youdao

The most popular theory holds that dark matter is made up of relatively heavy particles which, when they encounter one another, "annihilate" with a flash of light that the Fermi telescope can see.

BBC: Fermi telescope may change to dark matter hunting