"slack"的定义和意义

lacking in rigor or strictness

flowing with little speed as e.g. at the turning of the tide

the quality of being loose (not taut)

a stretch of water without current or movement

a soft wet area of low-lying land that sinks underfoot

a noticeable deterioration in performance or quality

dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve

make less active or fast

having hair of a dark color

make less active or intense

become slow or slower

cause to heat and crumble by treatment with water

become less in amount or intensity

be inattentive to, or neglect

to not put in the required amount of effort, care, energy, or attention toward one's responsibilities or obligations