Part 12
冲击chōng jī
an attack, under attack, a shock凹凸āo tū
bumpy, uneven, slotted and tabbed joint勘探kān tàn
exploration化石huà shí
fossil化肥huà féi
fertilizer北极běi jí
the North Pole, the Arctic Pole台风tái fēng
hurricane, typhoon号召hào zhào
to call, to appeal后代hòu dài
posterity, later periods, later ages周边zhōu biān
periphery, rim