避风港之所以得以发挥这种战略作用，因它基本自给自足。
The Refuge is able to perform such a strategic role because it is virtually self-sufficient.
但官员们仍担心如何保持中国粮食基本自给自足，以避免世界粮价上涨影响。
But officials worry about how to keep China near self-sufficiency in grain and sheltered from rising world prices. Mr.
这个想法基本上是可行的，使用一些能从周围环境获取能量、自给自足的小装置，像太阳能电池板那样。
The idea is basically feasible, using small devices that harvest energy from their surroundings and provide their own power supply rather like a solar calculator.
应用推荐