我们在远处看到了一只斑马。

We saw a ___zebra in the distance.

否则会有很多孩子和成年人从未见过大象、老虎、斑马等。

Otherwise there would be many children and grown-ups who [would have] never seen an elephant, a tiger, a ___zebra etc.

斑马独特的条纹帮助它在草原上伪装。

The ___zebra's distinctive stripes help it camouflage in the savannah.