Level 234
Level 235

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天文
astronomy
高考
college entrance exam
倾听
to listen attentively
调节
to adjust
优胜劣汰
survival of the fittest
亏待
to treat sb unfairly
油腻
grease; oily
一帆风顺
plain sailing; single sail; gentle wind (idiom)
笼罩
to envelop; to shroud
乘务员
attendant on an airplane; train; boat etc
周期
period; cycle
负担
burden
陶瓷
pottery; porcelain; ceramics
牢固
firm; secure
专科
specialized subject
Level 236