Having just moved from Nagasaki to Kamakura, Maiharu Hiromi leaves her house on a bike to attend the Minami Kamakura High School entrance ceremony, but she realizes that she's forgotten how to ride a bike for some reason. When she runs into Akizuki Tomoe, she begins practicing how to ride a bike, but...
so it's necessary to choose a material 
appropriate for your intended use.
لذلك من الضّروريّ اختيار مادّة مناسبة
.للغرض الّذي ستستعملنها له
Daher ist es wichtig, das richtige Material
für den richtigen Zweck auszusuchen.
así que es necesario elegir el material
apropiado para el uso que le darán.
então é necessário escolher um material
 apropriado para sua intenção de uso.