Scientific writing must be accurate. Although
writing instructors may tell you not to use the same word twice in a sentence, it's okay
for scientific writing, which must be accurate. (A student who tried not to repeat the
word "hamster" produced this confusing sentence: "When I put the hamster in
a cage with the other animals, the little mammals began to play.")
Make sure you say what you mean.
Instead of: The rats were injected with
the drug. (sounds like a syringe was filled with drug and ground-up rats and both were
Write: I injected the drug into the rat.