ld

US

UK

A1 初級
n. (c./u.)名詞 (可數/不可數)致死劑量
The LD50 of cyanide is quite low, meaning a small amount can be fatal.
n. (c./u.)名詞 (可數/不可數)學習障礙
The school provides support for students with LD.
adj.形容詞長途電話
She made an LD call to her family overseas.
n. (c./u.)名詞 (可數/不可數)路易斯安那州民主黨人
The LD supported the new bill.
n. (c./u.)名詞 (可數/不可數)鉛 (化學符號)
The chemical symbol for lead is Ld.

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