The secondary hydration of high fly ash content concrete is slow at the early period and then the velocity of it gradually increase.

高掺量粉煤灰混凝土早期二次水化较为缓慢，随后二次速度逐渐加快。

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It is appropriate to start with smaller amounts of physical activity and gradually increase duration, frequency and intensity over time.

适宜的方法是，从较小的活动量开始，然后随着时间的推移，逐渐增加持续时间、频度和强度。

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From there, you can stay at 30 minutes or increase the amount of time you run gradually, every two weeks. But do not overdo it in the beginning!

就这样一直坚持下去，一直跑30分钟或者逐渐增加跑步的时间坚持两周，但是，在这开始阶段，一定不要过分的增加时间！

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"If you switch on a cellphone on board, and there's no network, it will gradually increase the power it's transmitting because it's trying to get hooked on a network which doesn't exist, " he said.

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The Chinese government said it will gradually increase the value of the yuan compared to the US dollar over the next several years.

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And there will certainly come a time, and it will increase gradually as the year goes on, where he engages in more campaign activity.

WHITEHOUSE: Press Briefing