Levels challenge, the difficulty to increase gradually.

关卡多挑战，难度逐渐增加。

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In term of time, the Paleogene-Neogene paleolakes of the plateau had a trend to increase gradually in area from the early to late stages.

青藏高原古近纪—新近纪古湖泊的演化，从时间上讲，有从老到新面积逐渐加大的趋势；

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To avoid digestive problems, increase your fiber intake gradually, and don't forget to drink plenty of water.

为了避免消化出现问题，你需要逐渐的增加纤维素摄入量，也不要忘了要喝大量的水。

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Starting out as a technical skier, Whiteface also gave Weibrecht the chance to gradually increase his speed.

VOA: standard.2010.02.09

Going forward, we expect this number to increase gradually as the company expands its business in Europe and Asia.

FORBES: Abercrombie Rises With Global Buddy Gilly Hicks

Going forward, we expect it to increase gradually to around 22%, as the company believes that there is further scope for optimizing its supply chain and improving operational efficiency.

FORBES: Aeropostale Looks Like A $55 Stock

With August now less than six months away, no immediate pricing action is likely, but the analyst contends that the company is likely to gradually increase prices from here.

FORBES: Sirius XM: Price Hike Coming? And Then A Big Buyback Plan?