Restudying the vocabulary of the English language.
X chromosome X染色体 xenophobia 名词 仇外情绪 排外情绪 xenophobic 排外的 ...[作者空间]
yurt 蒙古包 yuppie 雅皮士 yummy 好吃的 Yuletide 圣诞节期间 Yule 圣诞节 yuc...[作者空间]
zygote n. the cell that is formed when a female reproduct...[作者空间]
