Earl could bring battering waves and a storm surge of up to three feet (one meter) above normal tide levels in some areas, according to forecasters.
厄尔可能在一些地区带来冲击巨浪和高达三英尺(一米)超出正常潮汐水位的风暴潮，根据预报员称。
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Tilt meter is one kind of basic instrument of earth tide and the earthquake research, which includes the horizontal pendulum tilt meter, the water tube tilt meter and the vertical pendulum tilt meter.