Antibiotic抗菌素，抗生素

“Antibiotic”在IELTS考试中主要考它的名词形式，这个词曾在3个version中考过，都要求填写这个词，

大家一定要记住这个词的发音和拼写（注意这个词有两种不同的发音）。

解释：

1、A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms.
由真菌，细菌和其它微生物产生或从中得到的一种物质，如青霉素或链霉素，可以破坏或抑制其它微生物的生长。

2、a substance produced by or a semisynthetic substance derived from a microorganism and able in dilute solution to inhibit or kill another microorganism