5月4日の文章

ひき肉には、通常、大腸菌が混ざっています。冷凍肉を解凍する時は冷蔵庫か電子レンジを使い、常温で放置してはいけません。

ひき肉 - ground meat

通常 - general, common

大腸菌 - E. coli

冷凍肉 - frozen meat

解凍する - to thaw

冷蔵庫 - refrigerator

電子レンジ - microwave

使い - use, in a "connective" form, used to connect two congruent ideas. Do not use this to replace "and," because there are sometimes better ways to go, like using て-form. Think of this sort of between そして and a semicolon.

常温 - room temperature

放置する - to leave

Translation:

In ground meat, there is generally a lot of E. coli bacteria mixed in. When thawing frozen meat, use the fridge or the microwave; don't just leave it at room temperature.