接二連三

to receive or answer; to connect or join; to catch or take over; to meet or welcome; to continue or extend

The number two; second in order; twice; a pair; dual; also used as a variant of 'to change' or 'to compare'.

to link; to join; to connect; continuously; in succession; including; even; surname; company (military unit)

The number three; 3; third in order; often used to indicate multiple or repeated instances; a surname.