After worrying long and hard over what to do about Shikijou's invitation to go hang out together, Kanade decides to try going on the date with him. When Himuro hears about it she leans forward excitedly to congratulate Kanade on finding someone she might fall in love with. Himuro is also eager to observe and analyze Kanade's date from afar in order to put it to good use in her own research. As she's thinking about this, Yukimura arrives and proclaims that he has devised a new standard unit for the measurement of favorable feeling, the Kanade love power. Then, Kanade's date becomes a double date!
you want every other variable 
to remain constant.
.فعلى كل متغيرة أن تبقى ثابتة
jedoch soll jede andere Variable
konstant dabei bleiben.
lo ideal es que todos
los otros factores sean iguales.
lo ideal es que todos
los otros factores sean iguales.
doit l’expérimenter
dans les mêmes conditions.
tutte le altre variabili
dovrebbero rimanere costanti.
o ideal é que todas as
outras variáveis sejam iguais.
менять лишь один параметр,
сохраняя все прочие.