0 one of two or more atoms of a particular element that have the same number of protons, but different numbers of neutrons in their nuclei -- isotop
radioactive/stable isotopes.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Kita boleh melengkapkannya selangkah demi selangkah walau bagaimanapun panjang jalan dan ia tidak boleh disiapkan walau sependek jalan pun jika anda tidak menandai tapak kaki anda.
