Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
紀元前 kigenzen pre-era, BC, BCEtoki
低下 teika fall, decline, lowering, deterioration, degradationsuru
エー足す1はビー e-tasu1habi- A+1=Bmath
高校 koukou high schoolgakkou, jlpt4
工作する kousakusuru stavět, budovatleda1, suru, verb