orphan (v)
/ˈɔː(r)f(ə)n/

(khiến cho) mồ côi

to make a child an orphan

chemical (n)
/ˈkemɪk(ə)l/ 

hóa chất

any basic substance that is used in or produced by a reaction involving changes to atoms or molecules

hike mountains (v)
/haɪk ˈmaʊntɪns/

leo núi

to go up or go toward the top of mountain

flora (n)
/ˈflɔːrə/

hệ thực vật

all the plants that grow in a particular region

fine (n)
/faɪn/

tiền phạt

a sum of money exacted as a penalty by a court of law or other authority

sewage (n)
/ˈsuːɪdʒ/

chất thải

waste matter such as water or human urine or solid waste

enemy (n)
/ˈenəmi/

kẻ thù

someone who is opposed to someone else and tries to do them harm

explore (v)
/ɪkˈsplɔː(r)/

thăm dò

to examine or discuss a subject, idea etc thoroughly

butterfly (n)
/ˈbʌtə(r)ˌflaɪ/

bướm

a flying insect with large colourful wings

toxic (adj)
/ˈtɒk.sɪk/

độc hại

poisonous and harmful to people, animals, or the environment

endanger (n)
/ɪnˈdeɪndʒə(r)/

gây nguy hiểm

to put someone or something into a situation where they might be harmed or damaged

ethnic minority (n)
/ˈeθnɪk maɪˈnɒrəti/

dân tộc thiểu số

a group of people with the same culture and traditions who live in a place where most people have a different culture and different traditions

crash (v)
/kræʃ/

va đụng

to hit something hard, making a loud noise and often causing damage

abandon (v)
/əˈbændən/

từ bỏ

to stop something that you are doing or planning to do, especially because it is too difficult to continue

wilderness (n)
/ˈwɪldə(r)nəs/

vùng hoang dã, bãi hoang

an area of land where people do not live or grow crops and where there are no buildings

counter (n)
/ˈkaʊntə(r)/

quầy thu tiền

the place to check and collect money of customers

invader (n)
/ɪnˈveɪdə(r)/

quân xâm lược

a country, army etc that uses force to enter another country

fauna (n)
/ˈfɔː.nə/

hệ động vật

all the animals that live in a particular area

contamination (n)
/kənˌtæmɪnˈneɪʃ(ə)n/

sự ô nhiễm

the process of making something dirty, polluted, or poisonous by adding achemical, waste, or infection

subtropical (adj)
/ˌsʌbˈtrɒpɪk(ə)l/

cận nhiệt đới

from or relating to the warm parts of the world just north and south of the tropics