挖: to dig, to excavate, to scoop out...
冷: cold...
丰厚: generous, ample...
便于: easy to, convenient for...
推进: to impel, to carry forward, to push on, to advance, to drive forward...
廉价: cheaply-priced, low-cost...
线索: trail, clues, thread (of a story)...
简短: brief (statement, summary etc), briefly, brevity...
风筝: kite...
贵重: precious...
