58: 是a L-shaped angle 还是an L-shaped angle？ 应该用哪个不定冠词？

Question 58: Which indefinite article should be used in a L-shaped angle or an L-shaped angle?

Answer: 'L' is pronounced as if it starts with a vowel sound -- 'el'. When you have a vowel sound at the start of the word, with a few exceptions, you use 'an'. For instance, an L-shaped angle.

When you have a consonant sound at the start of a letter sound you would use 'a'. For instance, a V-shaped angle.

问题：是a L-shaped angle 还是an L-shaped angle？ 应该用哪个不定冠词？

回答: "L"的发音其实是以元音开头的，就好像"el"。如果单词是以元音开头的，如无特殊情况，一般用"an"。 如果单词是以辅音开头的，则用"a"。如：a V-shaped angle.