clam是什么意思

双语用例

• Changes have propagated through benthic invertebrates, with the macrofauna changing from echinoids and large clams to opportunistic brittle stars and polychaetes.

• Pennsylvanian insect biostratigraphy is comparatively new and is being developed in conjunction with that of other non-marine animals, notably conchostracans (clam shrimps).

• In animal systems, studies on the activation of sea urchin and clam eggs have also found changes in enzyme activity and location.

• The upturned clam shell has the appearance of an open right hand.

• This activity is banned in almost all of the immense lagoon because clams have been contaminated by local industrial plants.

• Apart from an increase in the population of anadontid clams, enhanced immune responses in the fish also reflect much improvement in water quality.

• This suggests that the recovery of the polluted lake involved increased populations of anadontid clams in shallow waters.

• Cantilevering over the narrow opening is a rectangular wrought-iron frame, fixed to the floor at intermediate points and supporting a giant clam shell and seven candles.