用大约一分钟，让各种念头任意地涌进脑海。
For about one minute, let thoughts come freely into your mind.
用目前的计算机再次尝试时，这种方法用了大约一分钟。
When I tried this again on my present work computer, that approach took about a minute.
而现在他们用上了盖戳机。当时，邮局工人用这种机器一分钟大约能盖十二封信。
Now they use postage meters. Postal workers could stamp about a dozen letters in a minute with this machine.
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