The disappearance of an insect or a frog may not seem very important, but every animal is an important __________ in nature.
link
a plain background
n. 水族馆
aquarium
What's this?
It's a solar-powered refridgerator.
Only after I __________ this math problem can I start to solve it.
make sense of
Cheetahs are considered an __________ species, facing a high risk of extinction in the wild. Their global population is estimated to be fewer than 7,000 mature individuals and continues to decrease.
endangered
Polar bears are losing their __________ as ice is melting at a shocking rate.
habitats
When you're writing to apply for a job, please use __________ language.
formal
He __________ knocked the glass off the table just for fun.
deliberately