ruminate=deliberate沉思，vi
You’d better ruminate about the question before giving your answer.
burst vt 使破裂，冲破（也有vi 的用法）
Firefighters have been deployed in this region after a river burst its banks.
extend（welcome or sympathy）to sb向某人表示欢迎或同情
The premier（总理；注意premiere是首演的意思）extends welcome to all guests from different countries attending this meeting.
The governor extends sympathy to those affected by this extreme flooding.
rubber dinghy橡皮筏
Many people in flooded homes are being brought to safety with rubber dinghies.
a deluge of water洪水/ a deluge of rain暴雨
This deluge of water is only a drop in a bucket for what is needed to reverse the drought.
perilous危险的
This archipelago is in a perilous environmental condition.
migratory迁徙的，洄游的
This project will help us protect 2,500 marine species of which 38 are migratory.
nectar花蜜，不可数；pollen花粉，不可数；caterpillar毛毛虫，可数
Plants can respond to the sounds of bees to produce sweeter nectar and chewing sounds of caterpillars feeding on their leaves.
offspring后代，单复同形=progeny
Parents tend to pass down their properties to their offspring.
salamander 蝾螈，lizard 蜥蜴，两者长得比较像，但不是一个物种
qualm 不安，名词，可数
I always feel qualms walking alone on dark streets of a strange city at night.
