Just remember to smile as you say hello. A small wave is also polite.

只要记住说你好的时候带上微笑就行了，另外轻轻招手也会显得很礼貌。

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Experimental results show that vertical perforated structure have the advantages of small wave pressures and good effect of energy dissipation.

试验结果表明，开孔直立结构具有波压力小、消能效果好的优点。

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Based on the mechanics of wave, the expression of water wave propagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.

本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。

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Then a small wave of illness washed over communities of black farmers and laborers in a few southeastern states.

FORBES: When Americans Rejected Small Pox Vaccines

Phoenix, formed by four school friends, was among a small wave of artists whose music leapt the border in the late 1990s.

WSJ: Phoenix: That Rare Export, Pop Music From France

Japanese meteorological authorities said a small tsunami wave of two feet could result from the earthquake.

FORBES: News Wrap: Japan Lifts Tsunami Warning Following 6.7 Quake