1. hieroglyph /'haɪərəɡlɪf/ n.
【英文释义】a written character that looks like a picture: a character used in hieroglyphics
【试题原文】 The letter “H,” for example, comes from the Egyptian hieroglyph for “fence.”
2. tactic /'tæktɪk/ n.
【英文释义】an action or method that is planned and used to achieve a particular goal
【试题原文】 The abstraction of language is a necessary tactic to further develop our understanding of things we cannot see.
3. jeopardize /'dʒɛpɚdaɪz/ v.
【英文释义】to put something or someone in danger
【试题原文】 Led by Rutgers anthropologist Helen Fisher, the study found texting “jeopardizes your ability to express your emotion” and emoji have filled this hole as “another way to express emotion.”
4. homogeneity /ˌhɑmədʒə'niəti/ n.
【英文释义】the quality or state of being homogeneous
【试题原文】 This has shown itself nowhere as strongly as it has in reaction to the homogeneity of emoji faces.
5. smirk /smɝk/ v.
【英文释义】to smile in an unpleasant way because you are pleased with yourself, glad about someone else’s trouble, etc.
【试题原文】 The demand for ethnic diversity among the characters urged the Consortium to release a veritable color palette of smiling, frowning, winking, and smirking faces.
《SAT真题》2017年11月北美第5篇文章：Invasive Plants May Adapt to Climate Change Better than Native Species
6. invasive /ɪn'vesɪv/ adj.
【英文释义】tending to spreading; especially: tending to invade healthy tissue
【试题原文】 The purple loosestrife (Lythrum salicaria) --- an invasive wetlands plant that was introduced to North America some 50 years ago --- has become the bane of conservationists who have struggled to keep it under control.
7. thrive /θraɪv/ v.
【英文释义】to grow or develop successfully: to flourish or succeed
【试题原文】 Evolutionary biologist and University of Toronto professor Spencer Barrett wanted to challenge the assumption that invasive plants thrived in their new habitats without internally changing their characteristics.
8. postdoctoral /ˌpost'dɑktərəl/ adj.
【英文释义】relating to work that is done after a PhD has been completed
【试题原文】 To accomplish this, he and postdoctoral fellow Robert Colautti, of the University of British Columbia, planted purple loosestrife in different regions in North America to determine whether and how the plants adapted to distinct climates.
9. vice versa
【英文释义】used to say that the opposite of a statement is also true
【试题原文】 Specifically, they transplanted purple loosestrife from Virginia to Timmins, Ontario, and vice versa in what is known as a common garden experiment.
10. interaction /ˌɪntə'rækʃən/ n.
【英文释义】mutual or reciprocal action or influence
【试题原文】 The common garden experiment is an invaluable tool for understanding how the functioning of an organism’s genes is influenced by its environment and how this….interaction ultimately affects growth, development, survival, and reproduction in nature, says Coautti.
11. yield up
【英文释义】 to produce or provide something, such as a plant or crop
【试题原文】 These local plants also yielded up to 37 times as many fruits as the southern plant grown at the same location.
12. indigenous /ɪn'dɪdʒənəs/ adj.
【英文释义】produced, living, or existing naturally in a particular region or environment
【试题原文】 Colautti notes that the purple loosestrife found in North America contains far more genetic variability than the purple loosestrife indigenous to Europe, Asia, Africa, and parts of Australia, which suggests that there were multiple introductions of the plant from different continents to the eastern seaboard of the United States.
13. resilience /rɪˈzɪljəns/ n.
【英文释义】the ability of something to return to its original shape after it has been pulled, stretched, pressed, bent, etc.
【试题原文】 Barrett believes that it is the plant’s identity as an outbreeder, or a plant that sexually reproduces with others in its species as opposed to cloning itself, that contributes to its resilience in new climates.