第12课

rule, regulation

rigid, inflexible

pitiful, regrettable

all, whole

maybe, perhaps

to discuss, to consult

and

salt

spoon

to protect

function, effect

cannot, to be unable

not have, be without

section, length

detailed

to explain

for, to, with regard to

leaf

to educate

to use

language

direct, straight

to cause, to lead to

misunderstanding

friendly

to achieve twice the result with half the effort

to economize, to save

physical strength, effort

on the contrary

task, mission

opinion, suggestion

careful, meticulous

to reach, to attain