CLeaning the air - How many okants do you need to purify the air in a small flat?

purify v.

• VERB If you purify a substance, you make it pure by removing any harmful, dirty, or inferior substances from it.

botanist n.

• N-COUNT A botanist is a scientist who studies plants.

biography n.

• A biography of someone is an account of their life, written by someone else.
• N-UNCOUNT Biography is the branch of literature which deals with accounts of people's lives.

cohabit vi

• v-RECIP If two people are cohabiting, they are living together and have a sexual relationship, but are not married.

cooperate

collaberate

coexist

coincide

coordinate

coorespond

coherence

fascinate adj.

• VERB If something fascinates you, it interested and delights you so much that you thoughts tend to concentrate on it.

a plethora of

• a very large number of something, usually more than you need

be awash with

handy adj.

1. ADj-GRADED Something that is handy is useful.
2. PHARSE If something coomes in handy, it is useful in a particular situation.
3. ADJ-GRADED A thing or place that is handy is nearby and therefore easy to gey or reach.
4. ADJ-GRADED Someone who is handy with a particular tool is skilful at using it.

statistics n.

1. N-COUNT Statistics are facts whcih are obtained from analtsing information expressed in bumbers, for example information about the number of times that something happens.
2. N-UNCOUNT Statistics is a brance of mathematics concerned with the study of information that is expressed in numbers.

geek n.

1. N-COUNT If you call someone, usually a man or boy, a geek, you are saying in an unkind way that they are stupid, awkward, or weak.
2. N-COUNT You can refer to someone who is skilled with computers, and who seems more interested in them than in people, as a geek.

rabbit hole

seminal adj.

1. ADJ Seminal is used to describe things such as books, works, events, and experiences that have a great influence in a particular field.

filter v./n.

chamber n.

contaminate n.

volatile adj.

1. ADJ-GRADED A situation that is volatile is likely to change suddenly and unexpectedly.
2. ADJ-GRADED If someone is volatile, their mood often changes quickly.
3. ADJ-GRADED A volatile liquid or substance is one that will quickly change into a gas.

compound n.

carcinogen n.

1. N-COUNT A carcinoge is a substance which can cause cancer.

benzene n.

1. N-UNCOUNT Benzene is a clear, colourless liquid which is used to make plastics.

formaldehyde n.

1. N-UNCOUNT Formaldhyde is a strong-smelling gas, used especially to preserve parts of animals or plants of animals or plants for biological study.

headline n.

cite v.

ivy n.

• N-VAR Ivy is an evergreen plant that grows up walls or along the ground.

exaggerate v.

definitive adj.

tricky adj.

likely to deceive people

proviso n.

1. N-COUNT A proviso is a condition in an agreement. You agree to do something if this condition is fulfiled.

seal n./v.

hard evidence

keep up with

generate v.

review v./n.

rate n./v.

existing adj.

collection n.

tenfold n.

dispense with

horticulture n.

1. N-UNCOUNT Horticulture is the study and practice of growing plants.

peace lily

living wall

bromeliad n.

specimen n.

twig v.

1. N-COUNT A twig is a very small thin brance that grows out from a main brance of a tree or bush.
2. VERB If you twig, you suddenly realize or understand something.

mature adj.

absorb v.

tackle v.

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来源： https://www.cnblogs.com/xiaoheng2020/p/13508392.html