But because most contamination was spread by water on the floors of the reactors, bats are less likely to be contaminated than animals like field mice.
(most contamination; was spread; by water; L:on the floors of the reactors) (bats; are; less likely to be contaminated than animals like field mice) (bats; to be contaminated; )
most contamination bats bats
was spread are to be contaminated
by water L:on the floors of the reactors
less likely to be contaminated than animals like field mice