This kind of training is ineffective, and wasteful of scarce resources
這種訓(xùn)練沒有效率，而且是對稀缺資源的浪費(fèi)。
Try to avoid wasteful duplication of effort.
盡量避免無用的重復(fù)勞動。
This practice is frowned upon as being wasteful
這種行為被認(rèn)為是浪費(fèi)而不獲認(rèn)可。
It is wasteful to leave water running from a pipe.
讓水管里的水白白流掉，太浪費(fèi)了。
As consumers, we are very wasteful.
我們消費(fèi)者總是造成很多浪費(fèi)。