01
今日长难句
The plastic debris saturating our oceans has all kinds of well-documented toxic effects on ocean life many of which, in turn, harm humans, but scientists and conservationists have struggled to find sustainable cost-effective ways to clean it up.
02
词汇解析
detonate [ˈdetəneɪt] v. 引爆，（使）爆炸
intensify [ɪnˈtensɪfaɪ] v. 加剧，增强
downturn [ˈdaʊntɜːrn] n. 经济低迷，衰退
leave [liːv] v. 让......处于
cohort [ˈkoʊhɔːrt] n. 一群人，一批人
wrecked [rekt] adj. 毁坏的
03
结构分析
✔句子主干：
The plastic debris has effects on ocean life, but scientists and conservationists have struggled to find ways
✔定语1：
saturating our oceans
✔定语2：
all kinds of well-documented toxic
✔定语从句：
many of which harm humans
✔定语3：
sustainable cost-effective
✔状语：
to clean it up
✔插入语（状语）：
in turn
04
参考译文
The plastic debris saturating our oceans has all kinds of well-documented toxic effects on ocean life many of which, in turn, harm humans, but scientists and conservationists have struggled to find sustainable cost-effective ways to clean it up.
充斥着海洋的塑料碎片对海洋生物有着各种各样且证据确凿的毒害影响，而这些受毒害的海洋生物反过来又会伤害人类，但是科学家和环保主义者很难找到可持续的、具有成本经济效益的方法来清理这些塑料垃圾。
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