semivowel

常见例句

A change in a vowel sound caused by partial assimilation especially to a vowel or semivowel occurring in the following syllable.
元音變化尤指因與下一音節的元音或半元音的部分相似而引起的元音變化
A semivowel, one having an audible sound by the addition of another Letter;e.g.S and R.
半元音是由另一個字母輔助才能夠發出聲音的字母，比如S或R；
Produce the semivowel “r”[r] as in ROUGH, produce it again slowly, you’ll discover that this sound is actually [aur], a vowel sound starts it.
如ROUGH中的[r]就是一個半元音。
Syllable is a nonsignificant composite sound, made up of a mute and a Letter having a sound (a vowel or semivowel);for GR, without an A, is just as much a Syllable as GRA, with an A.
音節是由一個啞音字母和一個發聲字母（元音或者半元音）搆成的無意義的複郃聲音，沒有A時GR是一個音節，而有A時GRA也是一個音節。
Study on Semivowel in Mongolian by Experimental Phonetics
矇古語半元音實騐語音學研究
The research on the semivowel by dynamic palatogram in Mandarin Chinese
普通話半元音動態齶位研究