He was supposed to report about his character.

He stared at the corpse, trembling with fear.

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

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

The bottom quark plays an important role in particle physics.

He bought six apples.

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

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

Yu helped me with my homework.

It seems that this river is flowing backwards.