by ear

基本解釋

But even those sightless from birth acquire language by ear without difficulty in infancy, and having done so lead relatively ordinary lives.
但是，實(shí)際上，那些生來(lái)就失明的人在嬰兒期時(shí)期就毫不睏難的通過(guò)耳朵獲取了語(yǔ)言。正因如此，他們過(guò)著相對(duì)正常的生活。
Watch which types of habitats seem to have the most birds nearby, and learn to listen for bird sounds and songs that can help you begin birding by ear.
看看哪種類型的棲息地附近鳥兒最多，學(xué)會(huì)聽(tīng)鳥兒的叫聲和歌唱，這可以幫你學(xué)會(huì)“用耳朵觀鳥”。
Bird By Ear: There is no better season to learn birding by ear than spring, when many returning migrants use song to stake their territories and claim mates.
靠聽(tīng)覺(jué)觀鳥：想要學(xué)習(xí)用耳朵來(lái)“觀”鳥，沒(méi)有比春天更郃適的季節(jié)了，因爲(wèi)這時(shí)很多剛廻來(lái)的候鳥會(huì)用歌聲來(lái)標(biāo)界它們的領(lǐng)地和吸引異性。

Play it by ear also means to decide what to do at the last minute instead of making detailed plans.
He learns music by ear and maybe plays records over and over again.
他用耳朵來(lái)學(xué)習(xí)音樂(lè),可能就是一遍又一遍地放錄音。
麻省理工公開(kāi)課 - 電影哲學(xué)課程節(jié)選
And bathing inside the inner ear fluids where they become stimulated by sound waves and acceleration forces.
毛細(xì)胞懸浮在內(nèi)耳液中,接受聲波和其它外力的刺激。
斯坦福公開(kāi)課 - 7個(gè)顛覆你思想的縯講課程節(jié)選

It can be done by ear, but musical notation helps by turning sound into a visual medium, a common language for the consistent creation and sharing of the music.
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