1) More than 80 parties are contesting seats in the two-chamber parliament.

2) A two-chamber federal parliament would confirm these appointments.

3) Soon, it develops into a two-chambered heart, like a frog's.

4) The invention relates to a two-chambered alga microbial fuel cell and treatment wastewater method of low energy consumption thereof, belonging to the field of wastewater treatment.

5) Intriguingly, before the heart of a developing mammalian embryo separates into four chambers, it looks similar to the two-chambered zebrafish heart.