It also is less costly and easier to operate.
它的花费也很少,易于操作。
At the beginning of 1990s, computers became both cheaper and easier to operate.
二十世纪九十年代初,计算机价格下降,也更容易操作了。
A number of pieces of instrument designed for gene transfer made the technique more efficient and easier to operate.
用于基因转移的仪器、设备使这一技术更有效、更简便。
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