master ·noun (IN CHARGE)
Definition: a man who is in charge of a servant or a dog Level: B2
经过多年的陪伴，这只忠实的狗总是紧紧跟在它的主人身边。
After years of companionship, the loyal dog always walked closely by its ___master's side.
在这座大宅邸里，管家直接从主人那里接收每日的指令。
In the grand household, the butler received his daily instructions directly from the ___master.
我们应该记住，我们是技术的主人，而不是它的奴仆。
We should remember that we are the ___master of technology, not its servant.