D-ala
[医][=delta aminolevulinic acid]δ-氨基γ-戊酮酸,δ-氨基乙酰丙酸
🗣️ 情景例句
and they found it to be too easy--
他们发现字太简单了,
This is my second trip to the United States, and I really enjoy staying here.
这是我第二次美国之行,我很喜欢这里。
Often, we help them with the harvest.
我们经常帮助他们收割。
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