And the reason is that a sine curve is like so. 數(shù)學(xué)解釋說，正弦曲線是這樣的。
The accumulation(degree days)was obtained by measuring the area under a single sine curve fitted to the day's minimum and maximum air temperatures within 10 35℃ and 32℃. 測定單條正弦曲線下的面積獲得田間有效積溫，而正弦曲線在10．35℃和32．0℃范圍內(nèi)擬合日最低溫和日最高溫而得。
The intensity and position samples of the final-alignment signal are fitted with a cosine or sine curve, and then the series of peak points are derived from the model parameters. 利用余弦或正弦曲線對該精對準(zhǔn)信號進(jìn)行擬合，得到一系列的波峰點(diǎn)。
權(quán)威例句
To do so, astronomers resort to Fourier analysis, a mathematical technique that allows them to break a complex curve into a set of simple ones called sine waves. ECONOMIST: Extrasolar planets