Its course are enough to give the great bird with its immense wings sufficient sustenance and progress.
这过程足以给这种有特大翅膀的大鸟提供足够的支撑力和前进力了。
There's not much sustenance in a glass of orange squash.
一杯橙汁饮料没有什么营养。
She is weak from lack of sustenance.
她因缺乏营养而虚弱。
