Scientists say the compound is likely to cause cancer but have no hard scientific proof.
科学家们称这种化合物可能致癌，但是并没有确凿的科学依据。
This makes it hard to measure how any individual compound might affect the endocrine system.
这就造成困难，很难衡量任何一种化合物到底会如何影响内分泌系统。
While we were shooting in the compound, the security guards gave us a hard time.
在小区拍摄的时候，遇到保安的强烈阻挠。
While we were shooting in the compound, the security guards gave us a hard time.
在小区拍摄的时候，遇到保安的强烈阻挠。
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