He works as a public sector worker.

The trolleybus is very convenient as a means of urban transportation.

My house is located between three houses across and two houses next door.

He stared at the corpse, trembling with fear.

The bottom quark plays an important role in particle physics.

I'm looking forward to meeting my friends this weekend.

In physics, the charm quark is one of the six quarks.

He bought six apples.

It seems that this river is flowing backwards.

Yu helped me with my homework.