Since the water heater will operate far less frequently, solar will extend its life significantly.

由于热水器的运作频繁得多，太阳能将大大延长其使用寿命。

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But that's not very reasonable, so sometimes the soot-blowers are operated more frequently, sometimes far less frequently.

但这种定时定量的吹灰方式并不合理，常常造成吹灰不足或过于频繁。

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The problem of three-dimensional seepage analysis for the complex rock foundation is less frequently studied so far at home and abroad.

复杂岩基的三维渗流分析问题，目前国内外研究甚少。本文提出了一个以电网络法为基本求解手段的分析方法。

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Because this happens far less frequently elsewhere, it is very difficult to compare U.S. business taxes (either rates or payments) with those in other countries.

FORBES: Obama's Pandering To The Business Lobby And The Truth About Taxes

Although the device will not restore voluntary voiding, and patients will not know when they are going to urinate, the bladder will empty more completely and far less frequently than without the prosthesis.

ECONOMIST: We can rebuild him. We have the technology

Those pages are scanned far less frequently than those in the main index, meaning that once a page is marked for Google Hell, it can languish there for as long as a year before Google even deigns it worthy of a reappraisal.

FORBES: Condemned To Google Hell