要不是那个水下无人机，考察队就会错过整片珊瑚群落了。
If it weren't for the underwater drone, the research team would have missed the entire coral colony.
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If英 /ɪf/|美 /ɪf/
it英 /ɪt/|美 /ɪt/
weren't英 /wɜːnt/|美 /wərnt/
for英 /fɔː/|美 /fɔr/
解释
"If it weren't for" + 名词短语构成正式的条件假设，主句 would have missed 表达失去该条件后的后果。
If it weren't for the underwater drone, the research team would have missed the entire coral colony.
"If it weren't for" + 名词短语构成正式的条件假设，主句 would have missed 表达失去该条件后的后果。