A US vessel seized by pirates off Somalia is now back in the hands of the crew after they retook control of the ship.
一艘在索马里海域被劫持的美国船只在船员重新获得船只的控制权后，现在已经回到了他们的手里。
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However, two hands are contradictory, and the former requires the control signal to change smoothly, while the latter wants to maintain certain amplitude of motivation, so control need trade-off.