difficult to ...; hard to ...
method; process; manner; way; means; technique
deoxyribonucleic acid; DNA
thousands; several thousand
counter for occurrences; a time; an instance; inning (baseball); round; episode; chapter
to have two things (at the same time) (e.g. good and bad points); to also have something (in addition to something else)
to attempt; to test; to try out
to manufacture; to produce; to raise (crops); to invent; to dream up; to create
which way; which direction; which one (esp. of two alternatives); who
having not the slightest idea
please; somehow or other; one way or another
to give; to confer; to bestow; to kindly do for one; to oblige; to favour
middle of the night; dead of night
black with hints of blue (as in a bruise); bluish black
to be opposite; to face each other; to confront (an issue); to face
pointing out; identification
reproduction; duplication; reprinting
to prepare; to provide; to set up; to establish; to organize
fertilization; fertilisation; impregnation; pollination; insemination
frequency; rate of occurrence
male characteristics; manliness
to stand, walk, etc. shoulder-to-shoulder; to be on a par with
to carry (something) under cover; to carry concealed
to have a go; to try and do (something); to take a chance with something
to raise; to lift; to boost; to enhance
next generation; future generation
to; for; from the standpoint of; as far as ... is concerned
cruel; merciless; pitiless; tragic; horrible; terrible
case (e.g. receptacle, condition, event, legal action, letter style, etc.); Computer-Aided Software Engineering; CASE
to be disheartened; to be dejected; to be discouraged; suddenly (losing a lot of weight); looking emaciated; becoming very thin
to fall over; to fall down; to fall; to flop (e.g. of a play); to be a flop
to be filled with grief; to be overcome with sorrow