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to measure; to weigh; to survey; to time (sound, gauge, estimate)
to conjecture; to infer; to surmise
出発前に時間を計って準備しておきましょう。
Let's time ourselves and prepare before departure.
体重を計ってから記録する。
I record it after measuring my weight.
二点間の距離を正確に計った。
I accurately measured the distance between two points.