economical adj.

VERBS be, seem Solid fuel would be more economical.

ADV. extremely, highly, remarkably, very This new oven is highly economical. | fairly, quite

PREP. in This arrangement is more economical in its use of staff. | of more economical of time and resources | with This arrangement is more economical with space.

You can also check Google Dictionary: economical (English, 中文解释 )

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