  Magnetic reconnection is a fundamental physical process converting magnetic
energy into not only plasma energy but also particle energy in various
astrophysical phenomena. In this letter, we show a unique dataset of a solar
flare where various plasmoids were formed by a continually stretched current
sheet. EUV images captured reconnection inflows, outflows, and particularly the
recurring plasma blobs (plasmoids). X-ray images reveal nonthermal emission
sources at the lower end of the current sheet, presumably as large plasmoids
with a sufficiently amount of energetic electrons trapped in. In the radio
domain, an upward slowly drifting pulsation structure, followed by a rare pair
of oppositely drifting structures, was observed. These structures are supposed
to map the evolution of the primary and the secondary plasmoids formed in the
current sheet. Our results on plasmoids at different locations and scales shed
important light on the dynamics, plasma heating, particle acceleration, and
transport processes in the turbulent current sheet and provide observational
evidence for the cascading magnetic reconnection process.
