adj//ɪmˈpɪrɪkl/
based on experiments or experience rather than ideas or theories
........................ evidence/knowledge/research
an .................... study ( thực nghiệm)

OPPOSITE theoretical ( lý thuyết)

V : /ɪnˈstrʌkt/ HƯỚNG DẪN
to tell somebody to do something, especially in a formal or official way
SYNONYM direct, order

V:/ˈvɪʒuəlaɪz/
to form a picture of somebody/something in your mind
synonym: imagine

one of the most reliable ways

N
the chance of something happening; how likely something is to happen

SYNONYM probability (có khả năng)
There is very little .............of that happening.

N
the chance of something happening; how likely something is to happen
SYNONYM: likelihood

(adj) giving useful information : bổ ích.
The talk was both ........... and entertaining.
OPPOSITE uninformative

adj
having or showing a lot of knowledge about a particular subject or situation an .............critic ( nhà phê bình có hiểu biết).

V/N
to think or guess that the amount, cost or size of something is smaller than it really is
We.............d how long it would take.
My guess of 400 proved to be a serious...............

to become clear and fixed; (kết tinh)
to make thoughts, beliefs, etc. clear and fixed
Our ideas began to .................into a definite plan.