When you boil eggs longer, they won't go bad as quickly.
If you make your eggs hard-boiled, they will last longer.
ーWhen you boil eggs longer, they won't go bad as quickly.
「卵を固めに茹でると、腐りにくくなる」
to boil eggs longer「卵をもっと長く茹でる」=「固めに茹でる」
to go bad で「腐る」
ーIf you make your eggs hard-boiled, they will last longer.
「卵を固めに茹でると、より長持ちする」
hard-boiled で「固く茹でた」
to last longer で「より長持ちする」
ご参考まで!