You can imagine that when Maori first arrived in the new country, in New Zealand, it may have taken some time to find suitable materials for their kites.
你可以想象，当毛利人第一次来到新西兰这个新国家的时候，他们可能花了一些时间才找到适合制作轻帆的材料。
When a system is to be built, suitable materials must be chosen for the parts.
在创建系统时，必须为其部件选择合适的材料。
Do you have any difficulties in searching for suitable materials for your study?
你在寻找合适的温习材料时有没有困难？
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