忙しさ

(1)the state of being or appearing to be actively engaged in an activity; "they manifested all the busyness of a pack of beavers"; "there is a constant hum of military preparation"

(2)活発に活動に従事している状態、またはそのように見える状態

(1)they manifested all the busyness of a pack of beavers

(2)彼らは働き者たちの忙しさをすべて明らかにした

(3)there is a constant hum of military preparation

(4)軍事準備で常に活気がある