感谢

thank; praise; appreciate; acknowledge; give thanks to; express gratitude for; give thanks; thx; glad; obliged; grateful; thankful; appreciative; beholden; thanks; thank you; gratitude; appreciation; acknowledgement; thank-you

理解

understand; appreciate; grasp; realize; make sense of; absorb; make out; comprehend; apprehend; fathom; follow; get; see; take in; figure out; catch on; cotton on; perceive; understanding; perceptive; interpretative; interpretive; sensitive; feel; grip; notion; comprehension; interpretation; construction; with; in terms of understanding; in the sense of comprehending