bsp;characteristic of
Geologists find it useful to identify fossils in a rock sample because certain assemblages of species are characteristic of specific geologic time periods.
98. be clogged with
be crowded with
The roads are clogged with the traffic between the suburbs and the cities every morning and evening.
99. be coming into its own
正在立国时期
At a time when Canada was coming into its own, they felt that a major factor因素 in the development of a strong and healthy nation was a vital有生气的 and relevant实质性的 art.
100. be concerned with
Langston Hughes, a prolific writer of the 1920’s, was concerned with the depicting the experience of urban Black people in the United States.
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